Twenty-two years after "Jackass" debuted on MTV, the group who popularized pranking is back on the screen with "Jackass Forever." But in the years since Johnny Knoxville, Bam Margera, Chris Pontius ...

The actress attempted to "surprise" host Johnny Carson by pretending to tumble, only for him to think it was real. Brooke Shields is remembering the time a silly prank she pulled on The Tonight Show ...

This guy built a following off one of the weirdest, funniest pranks online. But when you go viral too many times, people catch on. How long can someone fake authenticity before it all falls apart?