Bill Deming - Signed Quarter to Yarn

Imagine this: You borrow a quarter from a spectator and have them initial it. You then grab a black cloth, clearly put their quarter under the cloth and give it to them to hold. You then pull away the cloth and the coin has disappeared into thin air! But wait! That's not all... You reach into your bag and pull out a clear glass with a big ball of yarn in it. Hand the ball of yarn to the spectator, and without ever touching it again, instruct them to pull the yarn until it's completely unraveled revealing an Altoids box with rubber bands all around it. With growing anticipation, the spectators open the Altoids container and to their astonishment inside rests their signed quarter!