How does David Blaine do the card trick where he tells the spectator to think of a card and then he tells them to flip the deck where ever they want and it is the card the spectator thought of?

Answer 1

After the spectator picks a card, he displays it to them openly and then secretly crimps the card. When the spectator shuffles the deck and hands it back, he lays it on the table and tells them to run their finger up the side and flick when they get the 'feeling' their card is there. Obviously, the finger just catches on the gap created by the crimped card and that is how they always cut to their selected card.