reminds me of when I once volunteered for a stage hypnotist at uni
I got sent back after about 10 minutes as I wasn't as suggestible as others on the stage. At no point does the hypnotist say – now your hypnotised, he just gets everyone relaxed then starts asking everyone to do fairly basic things like, imagine you are driving a car, imagine you are hot
everyone does it – evan me. You don;t shout out, no I'm not hypnotised. no one does
they send back the ones who aren;t really getting into it, then keep ramping up the things they ask the others to do. By this time they are stuck – they can't suddenly say "i'm not going to pretend to be a monkey", because earlier they were pretending to be Freddie Mercury – everyone would think they were an idiot. so they keep acting like they are hypnotised