There are various ways of hypnotising people. In the commonest, the patients are told that hypnosis will help them, is safe, and is not a sign of weakness of character. They are then asked to concentrate on a bright object, and the hypnotist suggests they are going to sleep. The patients goes into a trance, and can be made to remember things they have forgotten, or to do various surprising things. Hypnosis is sometimes used for public entertainment, but this is undesirable. People cannot be hypnotised into doing things they think are wrong.