Always been kinda iffy on the hypnosis thing. Not because I don't believe in it. Some people can be hypnotized, I've seen some who pretended and faked it. Or so they claim.
I can't really say one way or the other for these girls. Don't see why it wouldn't be genuine. The more interesting thing though is that these girls were in hysterics believing they were truly being foot tickled.
Just goes to show you how powerful the brain is. So I wonder. Normally when someone is tickled, their nerves send signals to the brain which in turn responds with laughter and squirming. However in this case, there was no physical contact at all, thus the nerves were not sending any signals to the brain. HOWEVER, the girl was laughing like she was being foot tickled, and for all intents and purposes truly believed she was being tickled. Sooo... in this case the brain was sending signals... to the girl's nerves telling her to experience ticklishness? Interesting.