I can't remember who the guy is, but has anyone watched the "mind control" program on Channel 4?
Its all psychology and judging people and their body language, but some of it is scarily good.
Last week he managed to get three medical students to feel toothache, and one of them had their hand go completely numb so that they could shove a needle through it without feeling pain. He managed to get 9/10 people right when judging which of his hands they would put their hands over (psychics got 44% right! - thats less than you'd get guessing).
Its all great psychology, but the fact that it works so well is scary