Introduce a deck of cards that has two holes punched through it. Any card (no force) is selected by a spectator, noted and replaced anywhere into the deck. The deck may now be genuinely shuffled by a spectator. You really have no idea as to the identity of the card or where it ois in the deck. A chop stick (a plastic stic0 is now puched through one hole and almost immediately the selected card rotates around the deck and stand upright. A wonderful revelation.