Distortion

A collaboration with ideas from Wayne Houchin, Michael Ammar, Kenneth Peh, and Jonathan Bayme. A card is chosen. In this case, it's the Six of Diamonds. The Four of Diamonds is also used. You clearly place the Six of Diamonds in the spectator's closed hands (in a sandwich manner), holding on to the Four of Diamonds.

As you slowly shake the Four, the pips -- that is, the diamonds -- are seen to visually multiply and move across the card to form the Six of Diamonds. The spectator opens their hands to find the Four of Diamonds, and all is handed out for complete examination.