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I've never been hypnotised but from the movies I've seen, your likely not in control and seems to follow the directives of the one whom is doing the Hypnosis.
It's not just that hypnosis is rare, it's only supposed to work on a very small percentage of individuals. The basic idea is that you believe it will work, and therefore it does.
Lol... funny you would say that about the movies. I agree with you on the fictitious nature of movies but, you'll also agree with me that fiction or not, movies are some of the ways new tech or developments in our world are developed or imagined.
Movies? Well, I don't. I think books are a far better at that. When I think of movies, I think of escapism, mindless entertainment, something to pass the time on a rainy day or when you have nothing else to do. Books are usually more in-depth, and they're often written by someone who knows what they're talking about. For example, many well-known science fiction writers, such as Isaac Asimov and Arthur C. Clarke were also scientists, and they used their knowledge to predict what might happen in the future.
Isn't it possible that some sick individual, needing therapy could subject himself to some therapy by hypnosis with a whole different intention at heart and then, without any suspicion during the process, the administrator digresses to fraud?
That's just one way I've chosen to think of it.
Well, I still don't think that's how hypnosis or hypnotherapy works, but then again, I don't have a PhD in psychology, so I could be wrong.