In this remarkable, tool-assisted video, speedrunner Agwawaf plays through Super Mario Bros., Super Mario Bros: The Lost Levels, Super Mario Bros. 2, and Super Mario Bros. 3 simultaneously using just one input, completing all four games without dying!

To make it all happen, Agwawaf abused programming errors and took advantage of special differences in the games' controls: "If you push left and right on the same time, SMB1 and SMB2J will walk toward right, SMB2 will run toward right and SMB3 will stop accelerating. Even if SMB3 jump, SMB3 won't accelerate."

Along with those and several other tricks, he was able to get to the credits in all of the 8-bit Super Mario Bros. games in under 11 minutes. I don't think I've ever completed a single Super Mario Bros. game in that time...

[Via @feitclub]