heh,
the joy of being a hypnotist that discovers RIP and etc after having the confidence to do the hypnotizing part.
First hypnosis is real. If you had an fMRI machine you could see the brain pattern change and be confident that you had succeeded.
Barring that there are other concrete tells. You sort of just have to do it to get used to noticing but there are things to look for.
The tension in the face tends to release and the face gets what is called "rounder or longer" they get a bit more flush as the blood vessels loosen.
The pupils dilate which is a pretty obvious sign. You will notice breathing pattern changes and even pulse changes if you can see a throbbing vain.
The problem from going Magnetic hands to full conversion is you doubt a) if you can do it, b) if its ethical and c) if they aren't just lying to you.
That last one was a big deal for me as I was convinced my friends were just putting me on. It wasn't until I had a friend that wanted me to do it again and again that I realized I was providing something she couldn't do on her own.
So find someone you trust and do it them until your sure they aren't lying and then go forth and convert people willy nilly
In the end the great thing about hypnosis is that if they don't want to do the suggestion they won't do it. Your totally off the hook.
--Infy