Cory Chapin - Alive!
This is just plain spooky! The spectator selects any card (free choice) and fold it in half, and then in half again. The card is handed back to you and it is place on top of your empty hand. The card folds in half then folds in half again, all by itself!
The card can immediately be removed from your hand by the spectator and examined. They will find nothing! There is simply no explanation for what they see.
They will be shocked!