Guess Which Hand

Creepy Carl, the bus stop guy, has a game he finds amusing: He asks strangers and friends alike to guess which hand he's hiding his quarter in. Every time you guess right, you get another quarter; every time you're wrong, he takes them all back. You can stop any time you'd like, but the more you play, the more you can win — and lose! Can you get more coins than the last guy… and can you keep them?