Original: http://www.youtube.com/watch?v=kILh7Fn0j3c&feature=g-u-u
Sources: Meet the Pyro - http://www.youtube.com/watch?v=WUhOnX8qt3I
Intensive Gaston Unit - http://www.youtube.com/watch?v=8coX8VkUKY8

Thought I'd place what goes on in my mind and the answer is simple, youtube poops and random shit. Fad started by SuperMarioGalaxy13.