When i was in HS, this restaurant in town opened a new arcade room, which had some of those machines. I eventually found out it could take pennies, so I used like the ten or so I had and got a few tickets. Then I planned a scheme to go to the bank, get a roll of pennies, and win big time. Well, by the time I came back like a week later, they fixed the machine and it no longer took pennies :( must have saw the pennies I put in and freaked out.