Bam Margera challenges Johnny Knoxville to bare-knuckle fight after being made to sign 'death waiver'

Bam Margera has hit back at fellow Jackass stars Johnny Knoxville and Jeff Tremaine for making him sign a 'death waiver'.

In the video, Margera refers to the wellness agreement Knoxville and Tremaine 'made [him] sign' in order to feature in Jackass Forever as 'basically a death waiver'.

By way of retaliation, Margera then - despite noting it's not a 'brand new idea' - challenges Knoxville to a fight.

"Jeff Tremaine is too much of a p***y to get in the ring with me," he continues. "But Knoxville, if I double dog dare him, he says if I double dog dare anything he'll do it."

Addressing his fellow Jackass star directly, Margera challenges Knoxville to 'get in the ring with [him] without any boxer gloves'.

"So I can ring, ring, ring, one, two, three, let's go, I f**k you up," Margera continues.

Adding fuel to the fire of his challenge, Margera goes on to repeatedly call Knoxville a 'p***y' which he says 'really makes [Knoxville] mad'.

Despite the whole premise of Jackass being the cast members conducting funny but often painful, indecent and dangerous pranks, fans of the franchise have flooded to Margera's post in concern.

One said: "Damn bro... I thought you were doing good man. I loved that interview you had recenly with Phil April and Jesse. You seemed in such high spirits and everyone looked so happy.

"You were a huge part of my childhood man. Hate to see you like this."

"Bam... I double dog dare you to get sober. It's really the only way you'll get the revenge you obviously want so badly," another added.

A third commented: "Save your energy for the important battles. Your family misses YOU."