Two different things can happen on frying. The first produces really strange looking mazes, ones where you can walk through walls but can't shoot through and other weird stuff. The second thing is harder to produce, and starts with the two players standing at the bottom of the field as if someone had reset the game, only there are no aliens on the screen. The left player appears to have infinite lives (or at least a lot of lives) but the right player only had 3. Resetting returns the game to normal.