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As this short video verifies, aftermarket mods aren't just for cars. (It also verifies that some people have cojones the size of Mt. Rushmore.) We d heard of kart racers adding a shot of nitrous to a one-cylinder 23,000 rpm racing engine. We just hadn t considered strapping that engine to something you ride standing up. Silly us.

Trans Am v Nitros Goped (I kid you not !) [ via College Humor]

Sweden s Mysterious, Flame-Shooting, 1,200hp VW Golf [internal]