The spectator selects a card and signs it. You tear it and give them a piece of the card to hold. Ask them for a cigarette, light it and blow on the rest of the card. The card disappears! Now... At the fingertips and with no cover, the spectator can tear open the cigarette by themselves. THERE IS A CARD INSIDE! It's the rest of the spectator's signed card!
Have this superhero power in your pocket ANYTIME and ANYWHERE.