Derren Brown, for those who haven't kept up with British TV, is a performer from Britain who specializes in mentalism (magic of the mind).

In this clip, in the form of a downloaded RealPlayer file, Derren demonstrates his card-counting skills at the Monte Carlo blackjack tables. While he does describe a legitimate card memory system that he purports to be using, I must say that I am very suspicious of his explanation, as the nature of true card counting is quite different than he claims.

Video Format:
RealPlayer