Okay, we're all aware of the "hands-free" Super Mario World levels people have created from time to time, yes?
How many of them actually play a tune while they run?
On one hand, it's just awesome on so many levels. On the other hand, somebody out there really needs something to occupy their time.
http://youtube.com/watch?v=ed4CHkN-Dkw
So I know it's definitely not the same thing, but it is another Mario related thing that just shows people have way too much time, and I thought of this as soon as you posted this thread.
Something about seeing Mario glide through insane levels without the pressing of a single button is awesome. Add the fact that it creates music and you have an instant win. Could you imagine how insane some parts of that level would be if you tried to do it after pressing buttons?
Favorite Part: When the heart shaped "ON" switches turn off. Seems to symbolize something. =P
If theres any flaw with it, it's that it uses hacked-in block types that are not found in the original game to propel Mario. Making it a bit untrue to the game's physics. But it's not a big thing.