LAKE, Justice.
We find no merit in the defendant’s several assignments of error relating to the admission of evidence.
The defendant contends that, upon his trial in Guilford County, on the charge of kidnapping therein, it was error, over [276]*276his objection, to permit Miss Sutton to testify that, after the car stopped in the wooded area in Randolph County, her assailant beat and attempted to rape her and to permit attending physicians to testify as to the nature and extent of her injuries. The acts of her assailant, to which Miss Sutton so testified, were all parts of a continuous sequence, consuming in its entirety approximately 20 minutes and occurring within a total distance of not over three miles. It is perfectly apparent that the abuse of Miss Sutton for the gratification of her assailant’s sexual desires was the purpose of his seizing her and forcibly carrying her from her home to the wooded area.
It is well established that, as a general rule, in a prosecution for a particular crime, the State cannot introduce, as part of its case in chief, evidence tending to show that the accused has committed another distinct, independent, or separate offense, but it is equally well established that this rule does not apply when the two crimes are parts of the same transaction and, by reason thereof, are so connected in time or circumstance that one cannot be fully shown without proving the other. State v. McClain, 240 N.C. 171, 81 S.E. 2d 364. The State, having introduced evidence of the bare bones of the offense charged in the indictment (kidnapping), is not precluded thereby from showing the entire transaction. Evidence of facts relevant to the crime charged is not inadmissible merely because it also shows the defendant to have been guilty of an additional crime. State v. Arnold, 284 N.C. 41, 199 S.E. 2d 423; Stansbury, North Carolina Evidence, Brandis Revision, §§ 91, 92. The purpose for which her assailant carried Miss Sutton from her home is obviously relevant to the charge of kidnapping. The violence of the assaults upon her and the injuries inflicted thereby are also relevant thereto. The separation of the State into counties has a bearing upon the venue for the trial of criminal offenses, but not upon the relevancy of evidence.
For the same reason, there was no error in permitting the State to introduce in evidence photographs taken of the interior and exterior of the automobile in which Miss Sutton was abducted, the bloody chisel and belt found therein and articles of Miss Sutton’s clothing found in and about the automobile in the wooded area to which she was taken and where the beating and the attempted rape occurred. The jury was properly instructed that the photographs were admitted for the purpose of illustrating the testimony of the witness by whom they were identified and not as substantive evidence.
[277]*277There was no error in admitting into evidence fingerprints lifted from the interior of the vent glass on the driver’s side of the automobile and the set of the defendant’s fingerprints taken after his arrest. The contention of the defendant is that these prints were lifted and taken by agents of the State Bureau of Investigation, into whose expertise in the lifting and taking- of fingerprints he was not permitted to inquire prior to their testimony concerning their search for, lifting and taking of the prints. Neither of these witnesses was asked to express any opinion concerning these matters. Each testified as to what he, himself, did. The defendant had full opportunity to cross-examine each of the witnesses, following his direct testimony, concerning the methods used in lifting and taking the prints. He did not do so.
The subsequent witness, who compared the fingerprints in question and identified a print taken from the car vent glass as that of the defendant, and who, himself, lifted the bloodied palm print from the chisel used in the beating of Miss Sutton and identified it as the palm print of the defendant, was stipulated by the defendant to be an expert in the field of fingerprint examination and identification. There was no objection by the defendant to the admission in evidence of this far more damaging print taken from the chisel. Obviously, some expertise is desirable in the lifting and taking of fingerprints, in order to assure usable prints, but a fingerprint, which was, in fact, properly lifted or taken, may be used by an expert for comparison, regardless of the previous training and experience of the person who lifted or took it. We do not perceive how an inexpertly lifted fingerprint could be transformed by that process into the fingerprint of a person who did not make it.
The defendant next contends that the court violated the hearsay rule in admitting into evidence certain out-of-court statements. In the first place, some of these statements are not hearsay at all. The cry of the badly battered girl to Mr. Whitt, “Please help me,” his exclamation, “Oh, my God!” upon his discovery of her and Mr. Sutton’s words of comfort to his stricken daughter, when he came to her in the Whitt home, could not, by any stretch of the imagination, be deemed to have been offered to prove the truth of the matters so stated. Thus, they are not objectionable as hearsay. State v. Crump, 277 N.C. 573, 585, 178 S.E. 2d 366; State v. Griffis, 25 N.C. 504; Stansbury, North Carolina Evidence, Brandis Revision, § 141.
[278]*278 Testimony of Officer Marshall concerning statements made to him by Miss Sutton on the night of the offense were admitted for the purpose of corroborating her previous testimony and the jury was so instructed. It was competent for that purpose. Likewise, it was not error to refuse to strike Mr. Whitt’s testimony that when he discovered Miss Sutton in the woods she said, “Please help me; there is a man going to kill me,” her prior testimony having been that she asked Mr. Whitt for help and told him she was “being raped.” In this connection, the discrepancy is of no consequence. Either version tended to show she was being feloniously assaulted by a man and was in need of assistance. To be admissible for corroborative purposes it is not necessary that the prior statement of a witness be in the exact words of her testimony at the trial, it being sufficient that the two are consistent. See, Stansbury, North Carolina Evidence, Brandis Revision, § 52.
Technically, it was error to permit the State, over objection, to show by cross-examination of the defendant that he was arrested eight times after he left North Carolina. State v. Williams, 279 N.C. 663, 185 S.E. 2d 174. However, the court, almost immediately, reversed its ruling and directed the jury to dismiss that matter from their minds as if they had never heard it. It was also technical error to permit Officer Marshall, called as a witness for the State in rebuttal, to testify that the defendant, while Officer Marshall was bringing him from Michigan to North Carolina, voluntarily told the officer that he, the defendant, had been arrested in St. Louis in connection with larceny of an automobile, the defendant, on direct examination, having testified that the arrest in St. Louis was for a traffic violation. However, in view of the record of the defendant’s former arrests, convictions, imprisonments and escapes introduced in evidence by the defendant, himself, through Dr. Rollins, it is inconceivable that this testimony by Officer Marshall contributed, to any appreciable degree, to the defendant’s conviction in this case. It must be deemed harmless error. These technical errors do not afford any basis for the granting of a new trial.
Over objection, Officer Marshall testified, in rebuttal, concerning the manner in which the defendant talked and acted on their trip together from Michigan to North Carolina, as compared with his manner on the witness stand, testifying specifically that, en route, from Michigan, he did not “roll his [279]*279eyes or roll his head.” Dr. Rollins, the defendant’s witness, had previously testified that the defendant “on occasion seeks to * * * present himself as mentally not responsible * * * in order to escape the consequences of his behavior.” A reasonable inference from the question of the prosecuting attorney to Officer Marshall is that, while the defendant was testifying, he rolled his eyes and head in such a manner as to cause the District Attorney to believe that he was putting on a show in an effort to convey to the jury the impression that he was not sane. The trial judge was, of course, in a position to know whether the defendant’s performance on the witness stand afforded basis for such belief. If so, the testimony of Officer Marshall in this connection was relevant and competent. If not, it would not be relevant but would seem, beyond question, to be harmless. We note that Officer Marshall did not express any opinion concerning the defendant’s sanity while he and the defendant traveled together. He merely stated facts observed by him, from which facts the jury could draw its own conclusion as to the defendant’s performance on the witness stand.
■ Clearly, there was no error in the denial of the defendant’s motion for judgment of nonsuit. Considering the. State’s evidence in the light most favorable to the State, as must be done upon such a motion, Strong, N. C. Index 2d, Criminal Law, § 104, it is abundantly sufficient to support findings that the offense of kidnapping was committed and that the defendant was the perpetrator of it. This being true, the motion for judgment of nonsuit was properly denied. State v. Roseman, 279 N.C. 573, 184 S.E. 2d 289; State v. Bass, 253 N.C. 318. 116 S.E. 2d 772. As Justice Sharp, now Chief Justice, said in State v. Dix, 282 N.C. 490, 193 S.E. 2d 897, “In our decisions, kidnapping is defined generally as the unlawful taking and carrying away of a human being against his will by force, threats, or fraud.” It was there held that there must be a substantial asportation of the victim. It is unnecessary in the disposition of this assignment of error to determine whether the unlawful taking and carrying away of the victim must be with a felonious intent. Here, the evidence for the State, taken to be true, clearly shows both a substantial asportation and a seizure and carrying away with the intent to commit the felony of rape.
The defendant next contends that, in violation of G.S. 1-180, the court expressed an opinion concerning the fact of the taking and carrying away of Miss Sutton in the following [280]*280excerpt from the court’s instruction upon the defense of unconsciousness, which defense we discuss below:
“Now, members of the jury, as I have told you, the defendant contends that he was unconscious at the time that Catherine Sutton was taken from the driveway of her residence and put in an automobile and then taken to a point two and a half miles away, to an old sawmill road in Randolph County. * * * If you find that the defendant was completely unconscious of what transpired when Catherine Sutton was taken violently from her driveway at her residence, put in an automobile and held down by an arm, and, thereafter, was beat about the head and sexually molested * * * then he would not be guilty, and it would be your duty to so find.” (Emphasis added.)
The court, in its charge, had previously told the jury that the State must prove the defendant is guilty beyond a reason-ablé doubt, correctly defining that term, and had further stated: “The Court expresses no opinion or intimations of opinion as to what the facts are. That is for you to determine. You determine what the facts are from your consideration of the evidence in the case * * * What any of the evidence does show, if anything, is exclusively a matter that you pass upon.
Almost immediately after the statement of which the defendant complains, the court, in concluding its charge, instructed the jury that if the jury found “from the evidence beyond a reasonable doubt” that the defendant “wilfully and intentionally took Catherine Sutton and carried her from her residence, the driveway of her residence in Guilford County to a point oh an old sawmill road some two and a half miles away in Randolph County, against her will, by taking her forcibly from the driveway of her home, placing her in an automobile and taking her in the automobile to the place in Randolph County on an old sawmill road, and without lawful authority, and this constituted a substantial carrying away, it would be your duty to return a verdict of guilty of kidnapping,” but if the jury did not so find, or had a reasonable doubt as to any one or more of those things, it would be the duty of the jury to return a verdict of not guilty.
It is well established that in determining whether there is error in the court’s charge to the-jury requiring a new trial, the charge must be construed contextually and as a whole. Strong, N. C. Index 2d, Criminal Law, § 168. So construed, we [281]*281find no basis for a new trial in the above quoted portion of the court’s instruction concerning the defense of unconsciousness.
The defendant assigns as error the following portion of the charge:
“Evidence of flight may be considered by you together with all other facts and circumstances in this case in determining whether the combined circumstances amount to an admission or show a consciousness of guilt. However, proof of this circumstance is not sufficient, in itself, to establish defendant’s guilt.”
The defendant asserts that the court erred in failing to add to this instruction a statement that no presumption of guilt arises from evidence of flight. It is true that flight of the defendant does not give rise to a presumption of his guilt of the offense charged. State v. Gaines, 260 N.C. 228, 132 S.E. 2d 485; Stansbury, North Carolina Evidence, Brandis Revision. § 178. However, it is not necessary so to instruct the jury and the above quoted instructions by the trial judge was free from error.
The defendant assigns as error the following instruction concerning the burden of proof with reference to the defense of insanity:
“The defendant has the burden of proving that he was insane. However, unlike the State, which must prove the defendant’s guilt beyond a reasonable doubt, the defendant need only prove his insanity to your satisfaction.”
As the defendant concedes in his brief, this instruction is in accord with numerous decisions of this Court. State v. Cooper, 286 N.C. 549, 213 S.E. 2d 305, decided 14 April 1975; State v. Atkinson, 275 N.C. 288, 314, 167 S.E. 2d 241, reversed as to death penalty only, 403 U.S. 948; State v. Harris, 223 N.C. 697, 28 S.E. 2d 232; State v. Creech, 229 N.C. 662, 51 S.E. 2d 348; State v. Swink, 229 N.C. 123, 47 S.E. 2d 852; and many others. In the Swink case, Justice Ervin, speaking for this Court, said:
“Since soundness of mind is the natural and normal condition of men, everyone is presumed to be sane until the contrary is made to appear. This presumption of sanity applies to persons charged with crimes, but it is rebuttable. (Citations omitted.) These considerations give rise to the [282]*282firmly established rule that the burden of proof upon a plea of insanity in a criminal case rests upon the accused who sets it up. But he is not obliged to establish such plea beyond a reasonable doubt. He is merely required to prove his insanity to the satisfaction of the jury.”
In State v. Creech, supra, speaking through Chief Justice Stacy, this Court said:
“It is the law of this jurisdiction that an affirmative defense, e.g., drunkenness or insanity, which partakes of the nature of a plea of confession and avoidance, is to be satisfactorily proved by the defendant unless it arises out of the evidence produced against him. (Citations omitted.) The onus of showing ‘justification, excuse or mitigation/ to the satisfaction of the jury, is on the defendant. (Citations omitted.) .* * * The presumption that the accused was sane and responsible for his acts persists until the contrary is shown to the satisfaction of the jury. Therefore, if the jury are left in doubt as to the sanity or responsibility of the accused, the presumption prevails.”
The defendant contends that the long line of decisions of this Court so stating the rule as to the burden of proof of insanity should be overruled. This we decline to do.
As to what constitutes insanity as a defense to a criminal charge, the court instructed the jury:
“The defendant was insane if, at the time of the alleged crime and as a result of mental disease or defect, he either did not know the nature and quality of his act or. did not know that it was wrong.” (Emphasis added.)
The defendant contends that this instruction places upon the defendant a greater burden than is imposed upon him by a test of insanity as stated in State v. Swink, supra, where this Court said:
“It is a well-settled rule in the administration of criminal justice in this State that an accused is legally insane and exempt from criminal responsibility by reason thereof if he commits an act which would otherwise be punishable as a crime, and at the time of so doing is laboring under such a defect of reason, from disease of the mind, as to be incapable of knowing the nature and quality of the act he [283]*283is doing, or, if he does know this, incapable of distinguishing between right and wrong in relation to such act.” (Emphasis added.)
We perceive no substantial differences between the italicized portion of the instruction given by the trial judge and the italicized portion of the rule stated in State v. Swink, supra, insofar as the nature of the burden placed upon the defendant is concerned. In fact, the language so used by the trial judge is precisely that used by Lord Chief Justice Tindall in Mc-Naghten’s case, 8 Eng. Rep. 718 (1843), from which the law of this State with reference to the test of insanity as a defense to a criminal charge derives. In State v. Harris, supra, Chief Justice Stacy, speaking for the Court, uses the two expressions interchangeably, saying:
“The test of responsibility is the capacity to distinguish between right and wrong at the time and in respect of the matter under investigation. * * * [I] f ‘the accused should be in such a state of mental disease as not to know the nature and quality of the act he was doing; or, if he did know it, that he did not know he was doing what was wrong,’ the law does not hold him accountable for his acts. * * * ”
Furthermore, in State v. Swink, supra, after stating the test as above quoted, Justice Ervin said, “The trial judge charged the jury, in substance, that to establish the prisoner’s plea of insanity it must be ‘clearly established’ that he did ‘not know the nature and quality of the act he was doing, or if he did know it, that he did not know he was doing what was wrong’.” (Emphasis added.)
The court said that it was error to charge that a plea of insanity must be “clearly established” but said nothing about the remainder of the charge. We find no merit in this assignment of error.
We come now to the defendant’s contention that the trial court erred in its instruction with reference to the burden of proof in connection with the defense of unconsciousness. That instruction was:
“Now, members of the jury, a person cannot be held criminally responsible for acts committed while he is unconscious. Unconsciousness is never an affirmative defense. Where a person commits an act without being conscious [284]*284thereof, such an act is not criminal even though if committed by a person who was conscious it would be a crime. The defendant has no burden to prove that he was unconscious. If you find that the defendant was completely unconscious of what transpired when Catherine Sutton was taken violently from her driveway at her residence * * * then he would not be guilty, and it would be your duty to so find.”
The defendant contends that the instruction that the defendant does not have the burden of proof on this issue and the instruction that the jury would find him not guilty, if it found he was “completely unconscious of what transpired” at the time of the alleged offense, are inconsistent and the court should have charged the jury to find the defendant not guilty unless they found beyond a reasonable doubt that he was conscious of what allegedly transpired.
This assignment of error has merit if, but only if, under the law of this State, a criminal defendant relying upon the defense of unconsciousness, also called automatism, does not have the burden of proof thereof. If the burden of proof is upon the defendant on this issue, the error in the charge was favorable to the defendant and does not entitle him to a new trial.
The defense of unconsciousness, or automatism, while not an entirely new development in the criminal law, has been discussed in relatively few decisions by American appellate courts, most of these being in California where the defense is expressly provided by statute. In Bratty v. Attorney General for Northern Ireland, All E. R. 3 (1961) 523, Lord Denning observed: “Until recently there was hardly any reference in the English books to this so-called defense of automatism. There was a passing reference to it in 1951 in R. v. Harrison-Owen [1951] 2 All E. R. 726.” The only express reference to it which we have found in our Reports is in State v. Mercer, 275 N.C. 108, 165 S.E. 2d 328, which we discuss below.
Unconsciousness, as a defense to a criminal charge, is discussed briefly in most of the textbooks and treatises on criminal law, the most extensive treatment of it, which has come to our attention, being in LaFave and Scott, Criminal Law, § 44 (1972), where it is said, “[a] defense related to but different from the defense of insanity is that of unconsciousness, often referred to as automatism: one who engages in what would [285]*285otherwise be criminal conduct is not guilty of a crime if he does so in a state of unconsciousness or semi-consciousness.” In State v: Mercer, swpra, at p. 119, this Court said: “Upon the present record, defendant was entitled to an instruction to the effect the jury should return verdicts of not guilty if in fact the defendant was completely unconscious of what transpired when [the victims] were shot.” See also: 21 Am. Jur. 2d, Criminal Law, § 29; 22 C.J.S., Criminal Law, § 55; Burdick, Law of Crime, §§ 216, 217 (1946) ; Brill, Cyclopedia of Criminal Law, §§ 124, 128 (1922) ; Bishop, Criminal Law, §§ 388, 395 (9th ed. 1923) ; Wharton, Criminal Law and Procedure, § 50 (Anderson’s Edition 1957) ; Weihofen, Mental Disorder as a Criminal Defense, pp. 121-122 (1958) ; Miller, Criminal Law, §39 (1934).
The defenses of insanity and unconsciousness are not the same in nature, for unconsciousness at the time of the alleged criminal act need not be the result of a disease or defect of the mind. As a consequence, the two defenses are not the same in effect, for a defendant found not guilty by reason of unconsciousness, as distinct from' insanity, is not subject to commitment to a hospital for the mentally ill.
The California Penal Code, § 26(5), provides: “All persons are capable of committing crimes except those belonging to the following classes: * * * Three.' Lunatics and insane persons. * * * Five. Persons who committed the act charged without being conscious thereof. * * * ” The Oklahoma statute is identical. Thus, the courts of these states have, quite correctly, held that the defenses of insanity and unconsciousness are not the same. People v. Hardy, 33 Cal. 2d 52, 198 P. 2d 865; People v. Methever, 132 Cal. 326, 64 P. 481; Carter v. State (Okla. Ct.), 376 P. 2d 351. Similar legislation is in effect in Arizona, Idaho, Montana, Nevada, South Dakota and Utah. See, LaFave and Scott, supra, at n. 7.
Sources of unconsciousness, recognized as a defense by courts and textwriters, include somnambulism (Fain v. The Commonwealth, 78 Ky. 183), somnolenture, hypnotism (see, People v. Worthington, 105 Cal. 166, 38 P. 689), cerebral concussion, delirium from fever or drugs, diabetic shock (Corder v. Commonwealth [Ky.], 278 S.W. 2d 77) ; epileptic black-outs (Smith v. Commonwealth [Ky.], 268 S.W. 2d 937; People v. Magnus, 92 Misc. 80, 155 N.Y.S. 1013), and drunkenness. Unconsciousness due to voluntary drunkenness was held no defense in Lewis v. State, 196 Ga. 755, 27 S.E. 2d 659.
[286]*286It is generally said that amnesia, in and of itself, is not a defense to a criminal charge. Thomas v. State, 201 Tenn. 645, 301 S.W. 2d 358; Bratty v. Attorney General for Northern Ireland, supra (Lord Denning’s opinion) ; Miller, Criminal Law, § 39(a) (1934); 21 Am. Juk. 2d, Criminal Law, § 30; 22 C.J.S., Criminal Law, § 55. In Thomas v. State, supra, the Supreme Court of Tennessee quoted Gray, Attorneys’ Textbook of Medicine, § 96.01 (3rd ed. 1949), as follows:
“Amnesia, loss of memory, may lead to crimes entirely unknown to the culprit at a later date. That is rare. More frequently, the accused, remembering full well what he has done, alleges amnesia in false defense. He is a malingerer. To prove his innocence or guilt may be most difficult. * * * Failure to remember later, when accused, is in itself no proof of the mental condition when crime was performed.”
The principal point of difference among the few reported decisions on the defense of unconsciousness is with reference to the burden of proof. In People v. Hardy, supra, the California Supreme Court said:
“In People v. Nihell, 144 Cal. 200, 77 P. 916, where defendant claimed he was unconscious by reason of epilepsy, it was held that the burden was on him to establish the peculiar mental condition upon which he relied, and the Court stated * * * ‘Men are presumed to be conscious when they act as if they were conscious, and if they would have the jury know that things are not what they seem, they must impart that knowledge by affirmative proof.’ This is merely another way of saying that defendant has the duty of going forward with the evidence, and it is entirely consistent with the rule that defendant has only the burden of producing evidence which would raise a reasonable doubt in the minds of the jury.”
In Bratty v. Attorney General for Northern Ireland, supra, the accused killed a girl, a passenger in his car, by strangling her with her own stocking. He testified that a “blackness” came over him and that “I didn’t know what I was doing; I didn’t realize anything,” and that he had previously had “feelings of blackness and headaches.” There was medical testimony that he might have been suffering from an attack of psychomotor epilepsy, a disease of the mind which could causé ignorance of [287]*287the nature and quality of acts done. There was no medical evidence of any other pathological cause for a state of automatism. The trial judge refused to submit the defense of automatism to the jury but did submit the defense of insanity, which the jury rejected. The House of Lords held: “The trial judge was justified in not putting the defense of automatism to the jury since the evidence attributed any involuntariness in the appellant’s act solely to a disease of the mind and there was no sufficient evidence of automatism, apart from insanity, to be left to the jury.” The Lord Chancellor (Viscount Kilmuir) said:
“It is necessary that a proper foundation be laid before a judge can leave ‘automatism’ to the jury. That foundation, in my view, is not forthcoming merely from unaccepted evidence of a defect of reason from disease of the mind.
* * *
“[In Hill v. Baxter [1958] 1 All E. R. 193 [1958] 1 Q.B. 277] Lord Goddard expressed the view that the onus of proving the defendant was in a state of automatism was on him because automatism is akin to insanity and further is a fact exclusively within his own knowledge. The other members of the court reserved this point.
H* «I»
“ (If one subtracts the medical evidence directed to the establishment of psychomotor epilepsy, I am of the opinion that there was not any evidence on which a jury could properly have considered the existence of automatism. Counsel for the appellant directed our attention to the appellant’s statement, to his evidence and to his previous conduct. In my view they do not provide evidence fit to be left to a jury on that question. They could not form the basis of reasonable doubt.
H* * *
“[N]ormally, the presumption of mental capacity is sufficient to prove that he acted consciously and voluntarily and the prosecution need go no further. But, if, after considering evidence properly left to them by the judge, the jury are left in real doubt whether or not the accused acted in a state of automatism, it seems to me that on principle they should acquit because the necessary mens rea — if indeed the actus reus — has not been proved beyond a reasonable doubt.”
[288]*288Lord Denning was of the opinion that while the ultimate burden rests on the prosecution to prove every element essential in the crime, it was entitled to rely on the presumption that every man has sufficient mental capacity to be responsible for his crimes. He said:
“[I]f the defence wish to displace that presumption they must give some evidence from which the contrary may reasonably be inferred. * * * The necessity of laying this proper foundation is on the defence: and if it is not so laid, the defence of automatism need not be left to the jury * * * . The evidence of the man himself will rarely be sufficient unless it is supported by medical evidence which points to the cause of the mental incapacity. It is not sufficient for a man to say T had a black-out:’ for ‘black-out’ as Stable,- J., said in Cooper v. McKenna [1960] Qd. R. at p. 419, ‘is one of the first refuges of a guilty conscience and a popular excuse.’ The words of Devlin, J., in Hill v. Baxter [1958], 1 All E.R. at p. 197 [1958], 1 Q.B. at p. 285, should be remembered:
T do not doubt that there are genuine cases of automatism and the like, but I do not see how the layman can safely attempt without the help of some medical or scientific evidence to distinguish the genuine from the fraudulent.’ ”
Although unconsciousness, or automatism, is a defense separate and apart from insanity, in that it may not be the result of a disease or defect of the mind, it does not necessarily follow that the two defenses are different in law with respect to the burden of proof. Somnambulism and epilepsy, two sources of the defense of unconsciousness, have been said to be like unto insanity. See: Tibbs v. Commonwealth, 138 Ky. 558, 128 S.W. 871; Zimmerman v. State, 85 Tex. R. 6, 215 S.W. 101; Oborn v. State, 143 Wis. 249, 126 N.W. 737; 21 Am. Jur. 2d, Criminal Law, § 29, note 6; 22 C.J.S., Criminal Law, § 64; Burdick, Law of Crime, § 216 (1946) ; Brill, Cyclopedia of Criminal Law, § 127 (1922) ; Bishop, Criminal Law, § 395 (9th Ed. 1923) ; LaFave and Scott, Criminal Law, § 44 (1922) ; Miller, Criminal Law, § 39(a) (1934) ; Wharton, Criminal Law and Procedure, § 50 (Anderson’s Ed. 1957).
In State v. Davis, 214 N.C. 787, 1 S.E. 2d 104, Justice Barn-hill, later Chief Justice, speaking for this Court, said:
“[I]t has long been settled in this State that although the burden of establishing the corpus delicti is upon the [289]*289State, when defendant relies upon some, independent, distinct, substantive matter of exemption, immunity or defense, beyond the essentials of the legal definition of the offense itself, the onus of proof as to such matter is upon the defendant.”
This rule was quoted as the ground for decision in State v. Brown, 250 N.C. 209, 108 S.E. 2d 283, and State v. Johnson, 229 N.C. 701, 51 S.E. 2d 186. It has been applied to the following defenses, denominated “affirmative” defenses: Drunkenness. State v. Arnold, 264 N.C. 348, 141 S.E. 2d 473; State v. Hairston, 222 N.C. 455, 23 S.E. 2d 885; State v. Cureton, 218 N.C. 491, 11 S.E. 2d 469; State v. Creech, supra. Self Defense and Mitigation. State v. Freeman, 275 N.C. 662, 170 S.E. 2d 461, Insanity. State v. Creech, supra; State v. Hairston, supra; In State v. Arnold, 35 N.C. 184, Chief Justice Ruffin, speaking for the Court, said the burden was upon the defendant, charged with murder, to prove he was under the age of 14, and so without legal capacity to commit the crime.
An affirmative defense is one in which the defendant says, “I did the act charged in the indictment, but I should not be found guilty of the crime charged because * * * . ” In Bratty v. Attorney General for Northern Ireland, supra, the House of Lords, and in People v. Hardy, supra, the California Court, were of the opinion that, once the defendant has introduced substantial evidence of unconsciousness, or automatism, the ultimate burden of proving consciousness, beyond a reasonable doubt, rests upon the prosecution, because an element of crime is the presence of mens rea at the time the act was done. The defense of insanity is said to be distinguishable because the law presumes sanity. We are unable to perceive a reasonable basis for distinction, in this respect, between insanity and intoxication on the one hand and unconsciousness from a different cause, on the other. In all three defenses the contention is the same— the defendant did the act, but should not be convicted because the requisite mental element was not present. The same presumption, which casts upon the defendant, claiming insanity, the burden of proving it to the satisfaction of the jury, and thus to negative the presence of mens rea, applies also to the defendant who asserts a temporary mental lapse due to concussion, somnolentia, epilepsy or the like.
In State v. Mercer, supra, the defendant, according to the State’s evidence, went to the home of his estranged wife, armed [290]*290with a pistol. When she refused to admit him, upon his knocking at the locked door, he kicked the door open, entered' and immediately shot and killed his wife, her woman companion and the infant son of the other woman. His testimony was that he became “blank in his mind” when his wife ordered him off the porch and “when he became conscious, he was standing on the porch and the pistol, which was beside his head clicked.” There was no medical, or other, evidence establishing any pathological explanation of the alleged “black-out.” This Court, saying there was no evidence of insanity, held, as one of several grounds for a new trial, that the trial court’s charge to the jury was deficient in that it limited the jury’s consideration of the alleged unconsciousness to its bearing upon the matter of preméditation and deliberation. We said, “Unconsciousness is never an affirmative defense.”
Upon further reflection, we are convinced that we erred in State v. Mercer, su/pra, in saying, “Unconsciousness is never an affirmative defense.” In that respect, State v. Mercer, supra, is hereby overruled.
■ Our research has disclosed no decision, other than State v. Mercer, supra, in which any court has held that the defendant’s uncorroborated and unexplained testimony that, at the moment of his otherwise criminal act, he “blacked-out,”- and so does not remember what, if anything, he did, is sufficient'to carry to the jury the question of unconsciousness as a defense. As above noted, the House of Lords has declared the law of England to be otherwise. Bratty v. Attorney General for Northern Ireland, supra. We need not presently determine whether, in that respect, State v. Mercer, supra, correctly applied the law of North Carolina.
We now hold that, under the law of this State, unconsciousness, or automatism, is a complete defense to a criminal charge, separate and apart from the defense of insanity; that it is an affirmative defense; and that the burden rests upon the defendant to establish this defense, unless it arises out of the State’s own evidence, to the satisfaction of the jury.
In the present case, the learned trial judge fell into error, in his instruction as to the burden of proof on the question of unconsciousness, by reason of our own error in State v. Mercer, supra, but his error therein was in the defendant’s favor and [291]*291could not have prejudiced him in any way. It does not, therefore, afford a basis for granting him a new trial.
Numerous other assignments of error set forth in the defendant’s case on appeal are purely formal or, not having been brought forward in his brief, are deemed abandoned. Rule 28, Rules of Practice in the Supreme Court; State v. Felton, 283 N.C. 368, 196 S.E. 2d 239; Strong, N. C. Index 2d, Criminal Law, § 166.
No error.