One of the more fascinating aspects of the ‘hidden camera’ gag happens after the cameras stop rolling and the joke has been revealed. In order to use any footage with civilians, one must first get them to sign a waver – thereby allowing the show/film the ability to use the footage just shot. As someone who has been on his fair share of ‘hidden camera’ sketches, I can attest to just how difficult sometimes it can be to get people to ‘sign’. There’s no telling how someone will react when they discover that ostensibly they’ve been made a fool of. So I can only imagine what that process was like on Jackass Presents: Bad Grandpa. There are genuine moments where Johnny Knoxville pushes unknowing people to the very brink of violence. But what happens after the prank is revealed? What goes through these poor people’s minds? How do they react to the ‘joke’?