A Psychological Impossibility

Performer picks up a number of cards from a shuffled deck, fans them out, and asks someone to select a card. Spectator who makes the selection is asked to remember which number from the end this card is.

Performer closes up cards and places them on table. He then picks up remainder of pack and asks another spectator to remove any card but not to look at it. Magician places this card in his pocket. First spectator then tells what number from the end of first section of deck his card was. Magician looks through this first pile and finds that card is not there. He removes the card which was selected from the second pile from his pocket and first spectator finds that this is the card which he selected mentally from the first pile.