Dig Dug

BUG: Lock up glitch - Kill all the monsters except 1. Stop him 2 spaces under a rock and hold him there. Dig up to the rock (making it ready to fall), go back down to monster, turn away (left or right), then quickly turn back and kill him just before the rock hits. The only way to advance to the next screen is to either get the fruit, or get killed under a rock.