Your spectators will be saying "WOW" when they see this incredibly visual card change, which happens right in front of there eyes!
If you saw this on TV you would be sure it was a camera trick!
Imagine having a spectator freely select any card (no force). The card is signed and replaced back into the deck. You state that by magic you will make their card rise to the top of the deck. You snap your fingers and turn over the top card, while you are waiting for your big applause your spectator tells you it's not their card.
This indifferent card is slid into a paper-thin clear black plastic sleeve just large enough to hold the card.
While the sleeve is held between thumb and forefinger, and with no hand movement of any kind, the indifferent card slowly and visibly changes into the signed selection!
The spectator can remove the card himself. There is nothing else in the sleeve!
