Johnny Knoxville, star of Jackass 3D, has revealed that the worst injury he ever received whilst making the movies was a broken penis.
The actor explained: "I tried to back-flip a motorcycle and I came off the bike and the handlebars broke off in my crotch.
"On the way to the hospital I didn't know if I'd have use of it anymore."
Knoxville also said that the pranks are relentless on set: "If you're not paying attention for one second someone's there to do something to you," he said.
Jackass 3D is currently showing in cinemas across the UK.