There is a small grocery store in my town that uses quarter operated locks on the shopping carts. To unlock them from the row, you put in a quarter, when you lock it back up, the quarter spits back out. Someone apparently thought that this magic box must hold hundreds of quarters because they took a cart about a mile down the road to my store, broke the box open, and then left it. They went through all that trouble just to get their own damn quarter back!