This guy used a rear shovelhead exhaust pipe to do this with. I can't stop laughing. Maybe a Darwin award contestant?? honorable mention anyway.
"This past Saturday night a hairbrained stunt went horribly wrong for a 62 year old resident of Oakland County, Michigan. Apparently the crazy codger had a ‘sledding party’ at his home on Townview Drive which came to an abrupt ending when he attempted to fly down a hill by fashioning a strange device to his back, made up of a motorcycle muffler, a piece of pipe, gunpowder, match heads and gasoline.
Oddly enough, witnesses say that alcohol may have been involved.
Half-way down the hill, the home-made rocket exploded, resulting in severe burns and damage to one of his eyes. When doctors searched for his ID at the hospital, the only thing they were able to find was a small business card with the following words neatly printed.
Wile E. Coyote – Super Genius."
http://www.zeitgeistyreport.com/breaking-news/2010/02/02/rocket-man-explodes-in-bizarre-sledding-accident%E2%80%8F/