First half is from "Mind Control," S01E02. Second half is from "Trick of the Mind," S03E04.
You can be fooled no matter how smart you think you are. Don't think you can be fooled? Just watch this video: http://www.youtube.c om/watch?v=voAntzB7E wE
Derren Brown does an old seance trick. From "Trick of the Mind," S03E06.
You can be fooled no matter how smart you are, and just because you can't explain it, doesn't mean there isn't a natural explanation to it. Forturnatly for this particular trick, I (or rather, Derren) included the explanation at the end.