Bending Card Trick (2338)

You show a pack of cards to the audience, and ask one of them to select and sign any card. You hold the card between your fingertips, and the card begins to slowly bend!

The card is under your complete control and you don’t move your hand or your fingers! You then cause the card to straighten up and can hand it out to be examined by a spectator, who confirms it is the same card with their signature.