There are NO GIMMICKS and NO SLEIGHT OF HAND. NOTHING is tricked in ANY way. The ONLY props are 3 UNPREPARED ESP design cards. No switches. No electronics.
Effect: Three manila envelopes, graduated in size to nest one inside the other, are handed out for examination as are 5 ESP design cards.
The mentalist then demonstrates what the spectator is to do during the experiment. That is, he is to hold the 5 cards, design sides down, and begin transferring one card at a time from the top of the packet to the bottom.
At ANYTIME he wishes, the spectator is to STOP … turn the top card of the packet face UP … and insert it IN BETWEEN the other face down cards.
The spectator is instructed to REMEMBER tahe one design that is now FACE UP. The five cards are now inserted into the smallest of the three manila envelopes. The envelope is immediately handed to the spectator to examine and confirm that the envelope is absolutely opaque.
The mentalist then removes the cards and after turning the one face up card, face down, hands them to the spectator to do as directed while the mentalist’s back is turned.
When tahe spectator has completed turning his freely selected design face up and inserted it between the remaining 4 face down cards, he is instructed to place the packet in the smallest manila envelope which the mentalist is holding behind his back.
The small envelope is now placed in the middle size envelope and the spectator places these inside the largest of the 3 envelopes.
The three nested envelopes are retained by the spectator who is asked to concentrate upon the mentally selected design.
The mentalist then proceeds to immediately reveal tahe spectator’s design … without any questions … and without fail. Almost as if he has X-Ray Vision or ESP.