The new "Jackass" movie features one of the stunt gang's most risque pranks - Bam Margera agreed to urinate on friends' faces and film their reaction at close range with the use of a 'Weiner Cam.'

The fun-loving prankster thought it would be a giggle to take a small camera to his penis and then sneak up on unsuspecting pals and pee on them.

Margera felt sure the stunt would be axed from the final edit of "Jackass 3D" - but the scenes were too funny to cut.

He tells Penthouse magazine, "It was kind of an experiment. It was a camera taped to my d--k and I was walking around, waiting to catch people in a deep conversation, then sneaking up behind them and peeing on their face. And it's all from the d--k's point of view.

"You can see this tan thing in the corner of the screen, and then all of a sudden p--s comes out, so you realize it's a d--k."