While testing the anaesthesia during hypnosis, an attack developed, his right arm and leg began to shake, first mildly and then with increasing intensity and frequency. His head also spasmodically turned to the right side. The movements soon became rhythmic. Arm and leg were abducted and adducted in a slow rhythmic way at the rate of about thirty-six times per minute. With the same rate and rhythm, the head turned to the right side, with chin pointing upward. The right side of the face was distorted by spasm, as if in great pain. The left side of the face was unaffected. Pressure over his right side (where he struck when he fell) elicited evidences of great pain. Respiration became deep and labored, and was synchronous with each spasm. The whole symptom-complex simulated Jacksonian epilepsy. Consciousness persisted unimpaired, but showed a curious and unexpected alteration. When asked what was the matter, he replied in his native dialect, “I do not understand what you say.” It was found that he had lost all understanding of English, so that it was necessary to speak to him in his native dialect. His answers to our questions made it apparent that during the attack, as in his dreams, he was living through the experience which had originally excited his trouble. The attack was _hypnoidic, a fear attack_, hallucinatory in character. He said that he was sixteen years old, that he was in Rovno (Russia), that he had just fallen, because he was _frightened_, that he was lying on the roadside near the cemetery, which in the popular superstitious fear is inhabited by ghosts. At that hour of the night the dead arise from their graves and attack the living who happen to be near. The hypnoidic state developed further, the patient living through, as in a dream, the whole experience that had taken place at that period. He was in a carriage, though he did not know who put him there. Then in a few moments he was again home, in his house, with his parents attending on him as in the onset of his first epileptiform seizures. The attack terminated at this point, and thereupon he became perfectly passive, and when spoken to answered again in English. Now he was again twenty-one years old, was conscious of where he was, and was in absolute ignorance of what had just taken place. It was found that an attack could regularly and artificially be induced, if the patient in hypnosis was taken back by suggestion to the period when the accident happened.