Johnny Knoxville got injured…A lot! On the set of the original Jackass television show, an ankle sprain sustained while performing a stunt forced Knoxville to wear a brace for most of the first season. While filming the first Jackass movie, he was knocked out cold twice: once during a department store match against pro boxer Butterbean and again when he flipped a golf cart. Knoxville would later top that in Jackass Number Two, claiming he nearly died when a rocket blew up on him during a stunt. Once while performing a motorcycle stunt for the Jackass-inspired show Nitro Circus, Knoxville was thrown from a motorbike. The 400-pound cycle landed on his groin, tearing his urethra. To this day, Knoxville must perform urinary catheterization on himself twice daily to prevent scar tissue from forming, and to keep the area clean.