The single greatest video on the Internets (not a rickroll)

[Lixivium]

http://www.youtube.com/watch?v=tIRCzbBB99E

Explanation: It's a series of custom-made Mario World stages in which Mario/Yoshi is being moved about entirely by the stage, with no one controlling him.

[DarkBlood]

Haha, Hare Hare Yukai at 01:05. xD