\ said:
It is nothing like the apparent sudden trance invoked by stage performers, who seem to be able to make volunteers behave like chickens and monkeys.
There are two major differences between this and what you will most likely experience in a therapist's office. First is the type of induction (the process by which you are brought into a hypnotic state). Brian Weiss at least always uses a slow, meditative induction (like you will hear on CDs or see scripts for) with first-time subjects and at workshops for groups. He also does use a rapid induction similar to the "stage performers", but only if the subject is comfortable with it, which personally I wouldn't be.
Second, and more important in my opinion, is what the therapist does while you're hypnotized. I like to think of it as a state in which you have root (administrator) access to yourself. Weiss was very good about always
suggesting that you see and do things rather than commanding you to do them, allowing you to remain in complete control of your own experiences. The stage performer does not automatically have power over you by you being in hypnosis, but since your ego--the part telling you not to act like a chicken--is not at the forefront of your mind like usual, you might not feel there's anything wrong with the performer's command. As far as making someone forget the number three... that disturbs me. It shows how powerful this technique is, but I feel that its power could be better and less hurtfully demonstrated by healing someone rather than breaking them. I really hope they hypnotized him again afterwards and made him remember 3 again.
Now, this is one thing that bothered me as well before I went to the workshop: I thought that in hypnosis I would be somehow less conscious or less in control of myself. This was not the case in my experiences; in some ways I felt more clear-headed than normal. I wouldn't say that my ego was "turned off", but that it was watching and commenting on the movie instead of sticking its face in front of the camera. I thought, before the workshop, that I would have to not judge the things I was seeing or else I wouldn't see anything, and I was worried I wouldn't be able to do that because I love to judge things.

It's more that you have to not let your judgement of things stop them from happening, because in that state you do have the power to stop them from happening (or at least stop yourself from experiencing them). As I described in
my experiences, there was a point where I was very conscious of the fact that I was judging what I was doing, but doing it anyway for a different reason. Come to think of it, this was a great experience of the difference between ego (the judging part) and what is really "me".