Double Detection

This is one of Richard Himber's effects. It is easy, mysterious, and requires but a few moments to perform.

Effect

'erformer gives deck of cards to a spectator and requests him to put he deck behind his back. Holding deck backs up, he is requested to cut the deck anywhere he chooses and to reverse the bottom packet so that when deck is squared up, the two packets face each other. Performer names the two cards facing each other in center of deck.