Test Conditions Trick

Performer begins by displaying a deck of cards spread face up on a table. The deck is squared up, turned face down; a complete cut is executed and handed to a willing participant. At this point the performer turns away and instructs the volunteer to cut to any card, remember their card, shuffle the cards and then spread those cards, face down in a sloppy pile. The remaining stack can be placed inside the card box. The performer turns around, concentrates for a moment and then correctly identifies their card.