It's probably happened to you.
You're at a department store, a grocery store, a restaurant -- and the cashier gives you too much change. Should you keep it?
Is it the store's misfortune and your lucky day?
Or should you do the right thing and return the money?
To find out what people do when they think no one's watching, "Primetime" set up hidden cameras in a New Jersey diner and gave the cashier a stack of extra $10 and $20 bills, to dispense along with the customers' change, as if by...Full Story