The third stage of hypnotism consists of a profound trance-like condition in which there is catalepsy--that is, firm contracture of muscles all over the body--and as the extensors are stronger than the flexors, this contracture takes place in the extended position. The cataleptic condition is really a nervous spasmodic seizure rather than a true stage of hypnotism. It is probably always harmful for the patient to have it induced. Its occurrence as one manifestation of hysteria, apart from hypnotism, shows its real character. It is with this stage of hypnotism that professional hypnotists, who give exhibitions, make their demonstrations--that is, of course, when their demonstrations are really hypnotic and are not merely, as is often the case, performances by actors trained for the purpose. Catalepsy is entirely pathological; experiment with it then is eminently undesirable, and certainly should not be undertaken except under the most careful precautions and by a physician. One of its dangers was very clearly pointed out by the death of a young man, who in a cataleptic condition was subjected to certain strains upon his thorax which brought about the rupture of an aortic aneurism. Catalepsy never permits of suggestion in such a way as to be helpful to the patient. It always leads to further functional deterioration of the nervous system, and yet it has unfortunately come to mean for many people the most essential characteristic of hypnotism. Its production is supposed to represent the acme of skill in the hypnotist. Nothing could possibly be less true nor be more likely to do harm.