The proof of how powerful hypnosis can be, comes in many forms. So much so that certain practices have long since been discontinued on the basis ethics and professionalism.
Some years ago, a fairly common practice in stage hypnosis was to induce a state called the full body catalepsy. In this state, the subject experiences a complete rigidity of all the muscle groups in his body. He/she becomes completely stiff, like a piece of wood. As a demonstration, stage hypnotists would often position the subjects head and feet on opposing chairs, without support through the torso and legs. This created a sort of human bridge, upon which the hypnotist would sit or stand.
The full body catalepsy contains no therapeutic use whatsoever. It serves merely for theatrics, and its obviously quite frowned upon today. It is unlikely to be seen very much these days for ethical reasons. Despite the fact that youre unlikely to see such a stunt, it remains a strong example of how powerful hypnosis can be. The act of turning a persons body into a rod of iron with mere suggestion is quite simply an amazing feat.
To a greatly lessened extent, catalepsy is still used today, but only...