So I was unaware of this, but people hack Mario games to make them play automatically when the game starts. Like you don't need to push any buttons, Mario just starts with some momentum and he plows through the level thanks to its intricate design of bumper blocks, etc. They're pretty amazing, and I posted a couple more after the jump, but this one is particularly neat because they made the sounds match up with some techno song playing the background. The video is 11:00 long, but the first two minutes are the best, as the game and song don't match up so super duper after that.
But hell, watch the whole 11:00 if you want, just don't come asking me for a life refund. I'm still busy trying to get two and a half years back from my first ex-girlfriend.