Your fake cash wasn't fake enough, you get a bag of pretzels because the machine thought it was real. I insert a tiny piece of cheese.
I steal all the money, adding up to 1,250,000. I insert the stickiest glue you've ever seen, so the next guy to use it gets stuck.
*Slowly and gently takes Andrewkm out, explains to him what Icondigi did, and asks for a million dollars as reward* Puts in a space ship.
You get a dollar I insert a woodchuck holding a piece of cheese that was measured to fit and it will never ever come out and if you break the machine or open it or take it out the game ends and you lose and yadayadayada