They say that imitation is the sincerest form of flattery, but when it comes to Jackass, imitation is a really quick way to get yourself effed the eff up. Johnny Knoxville, Bam Margera, WeeMan, and the rest of the Jackass crew have been doing their thing for going on a decade now, and they're about to take their schtick to another dimension today with the theatrical release of Jackass 3D. They've inspired a host of copycats over the years, many of whom have gone on to "greater things" (burn units, emergency rooms, etc.). In a nod to the Jackass crew, and as a public service to all you dumbasses out there who might be tempted to follow in their footsteps, we present the most painful Jackass copycat fails.