Incredible card trick?!?

Question

My friend performed a card trick on me. He held out all the cards, face down, like this: http://card-tricks.21ace.com/pictures/an...

and told me to think of a card in my head, and to tell it to him. Then I picked a card from his hand, ( I PICKED, IT NOT HIM )( he didn't move or do anything to the cards ) and it was the card that I told him I thought of!!!

How did he do this??

Answer 1

He looked at the card above the one you picked, even if the cards are shuffled they are unlikely to separate.