Cardiograph by Wayne Dobson and JBM

An incredible REAL WORLD trick that makes layman shout out loud. 2 cards are signed, one blank faced card and one joker. Magician signs the blank card, the spectator signs the joker. The spectator is asked to keep his finger on the back of the joker he signed. The 2 cards magically change places. But wait, your signature also travels across and is now on the card they are holding.

Comes complete with specially printed gimmicks, extra cards and an instructional dvd.

Easy to do, no reset.