Al Cohen's Greatest Effect Ever!
Show a half dollar and ask a person mark their name on it.
Try to vanish the coin, but magic won't make the coin vanish.
So you reach into your pocket for you lucky Keys and chain!
Have the spectator hold the lucky Key chain very tight.
The marked coin vanishes as they are holding the Keys!
They open their hand to find the marked coin inside the Key chain!!
The coin is actually inside the key chain!
Unscrew the Key chain and return their coin.