'Jackass' Gang on Their 12 Most Outrageous Stunts

From penis-breaking backflips to the 'poo-cano,' Johnny Knoxville and friends on the stories behind their craziest moments

'Old Men Behaving Badly'

The Jackass crew's penchant for dressing up in geriatric prosthetics and wreaking havoc gave birth to a number of memorable pranks ("old-man balls," anyone?), as well as a spin-off movie/franchise: Bad Grandpa, in which Knoxville's crazy coot Irving Zisman goes batshit on unsuspecting locals.

Stephen "Steve-O" Glover: It's funny anytime you see an old person do something fucked up.

Jason "Wee-Man" Acuña: There is going to be a time when we're all sitting at these old folks homes, tattooed up, wrinkled, gray hair, talking about Jackass. That gave us a glimpse to that feeling.