Borrow any coin and have it signed on both sides by the spectator. The magician then places the coin on the outside of a regular card box. Slowly, the coin is rubbed against the box and melts right through to the inside. The box is shown all around, and your hands are completely empty. If you give the box a shake, you can hear the coin inside! Fairly open the box and dump the coin out into their awaiting hands.
No Reset. The card box is ungaffed, no switches!