Your audience choose a card and sign their name on that card, you also choose a different card and sign your name to it. You put your card in the post box, the card also spectators will be placed in the middle of the deck. Then you make a few moves like dropping down from above deck ... once two cards have been repositioned, the cards will be in the audience inside the box while all your cards and on the Posts outside the box. A strangely moving and convincing. Gimmick easy to use, easy to perform, undetectable and completely improvised