Some of you guys might find this quite interesting :-)
Btw: Derren Brown does not pretend to be some sort of 'mystic', everything he does is perfectly explainable by Science. Most of his tricks seem to be a combination of things, on youtube you can see some of his work anaylsed which should give you an idea of where he's comming from (for example http://www.youtube.com/watch?v=ybmOlQRuaYM
) but sadly not this. Enjoy.