I finally got three boom barrels!
They actually did go "Boom!", which is what I wanted to see.
It only cost me 100 tokens, so I was still in the game.
I tried monkeying around with the debug mode. If I placed Guy in the middle of the slot machine then cycled F1 back to normal, Guy would scream, and a shaking "Try Again!" message would appear. I'm assuming this is the outcome if I lose all my tokens.
