James Farr created this TMNT and Super Mario Bros. mashup which actually looks quite good.
Chris Novello hacked an NES ROM of Super Mario Bros. and turned it into an instrument. And then it gets crazy.
This guy achieves the lowest possible score in Super Mario Bros. for NES by not killing anything, not dying, and waiting for the last possible moment to lower the flag at the end of the level. Interesting speed run.