One coin and an impossible journey. This is JUMPER!
Imagine borrowing a new deck of cards or box of cigarettes. Then borrow a coin and have it signed. After you take the coin, in the blink of an eye, it appears inside the cellophane of the box, like some weird artifact of quantum mechanics. They can visually examine the coin inside the cellophane!
This requires no special gimmicks of card or coin, and everything can be borrowed. It's incredibly visual, and incredibly baffling for spectators.
Download JUMPER now and you'll have them jumping out of their seats!