...and when he caught on he politely "de-hypnotized" us and sent us back to our seats amid applause.
I find this situation odd. I would never have turned my back on a subject, ever.
I mentioned a few ways of determining when a subject was "faking" hypnosis, but I think what needs to be said here is that after going through very subtle tests to determine if he is in fact under hypnosis, the subject may actually be trying to behave in a manner expected of him in order to please the operator (hypnotist). Yes, no question that this is definitely possible, however I have tried to imagine a situation where I had chosen several potentially good subjects, and discovered any of them actually putting me on, or actively trying to deceive me. This is not something I myself have ever experienced, but I guess it is possible. In all cases where I felt they were not sufficiently deep in the trance, I merely asked them to wake up and moved on to the others. There are just too many details that a person would have to know in order to pull off a deceptive trance state.
I have not heard any good evidence that hypnosis is BS just yet. I think there are excellent subjects, mediocre ones, and those who just never will be hypnotized, like myself for instance. The excellent ones can be given a post hypnotic suggestion that a single word can induce the hypnotic state. I have done this many, many times. In fact, on several occasions, I tried the so called "zap" method. The subject, fresh out of an audience, is told to close his/her eyes, and told they cannot open them...try hard to open your eyes, etc. If he cannot, then just touch the shoulder, and say, "You are deeply asleep..." It worked once for me.
I read a fair amount about hypnosis many years ago, and lost interest at some point, but as I mentioned, there was a common thread that seemed to me to join all the really excellent subjects. Something like "outgoing, good listener, smiles a lot, not afraid to be touched," all kinds of things in this vein. It became kind of a sixth sense for me when choosing subjects. It was honestly a lot of fun, because people seemed to enjoy being hypnotized.