Johnny Knoxville is no stranger to head injuries. In the decades since he rose to fame as the daredevil ringleader of "Jackass," he has had more than a dozen concussions - that he knows of.

Johnny has been putting his body on the line for years. Last year, the group put out Jackass Forever, their fourth feature length film. Now in his 50's, Knoxville almost died making Jackass ...

Johnny Knoxville's last Jackass film, "Jackass Forever," came out in 2022, and he made his way back on TV this year with a new show co-starring Eric André and Gabourey Sidibe, "The Prank Panel." ...

Actors Steve-O (L) and Johnny Knoxville arrive at the premiere of Paramount Pictures and MTV Films’ “Jackass 3D” at the Chinese Theater on October 13, 2010 in Los Angeles, California.