SandBox by Arie Bhojez
impossible sandwich and card thru box.
before playing, magician put two king into the box. and then lets the audience choose a card, and a card signed.
The card is placed in the middle of the pile, magician put the box on top of a pile of cards. With a snap, the card selected by the audience have moved in between the two kings in the box.


100% impromptu