Some Japanese ROM hackers — probably the same insane folks that brought you those Impossible Mario games — have figured out a way to make a level play itself so long as you don’t touch the controller. I have to say, this is some twisted kind of epic. It must have taken months to put this together, such that the sound effects sync perfectly with the custom music inserted into the ROM image.
Did you catch the Megaman tribute in the song? Yes, that made me insanely happy.