George Clooney is famous among the famous for his pranks, and cardboard cutout of a human Ashton Kutcher is such a prankster he had his own prank show called Punk'd, but Clooney's pranks don't end in physical assault.
Punk'd, on the other hand, featured a segment where Donald Faison pranked his Scrubs co-star Zach Braff by making him believe his brand new Porsche had been tagged on by a group of teen ne'er-do-wells.
Donald clearly wasn't aware of Zach's anger issues, nor could he have known Zach would chase down and beat the crap out of a 12-year-old, which they was edited out of the episode because "you're not supposed to punch people on Punk'd".
And speaking of pranks pushing an actor to their limit- Leonardo DiCaprio seems to think beating the crap out of his fellow actors is a funny prank, but Wolf Of Wall Street co-star Jonah Hill isn't a fan of the rough stuff, so he decided to teach Leo a lesson.
Jonah's improv skills gave him the perfect opportunity to prank while filming a scene where he and Leo are eating sushi- the script called for Jonah to eat the last piece but he thought fast and had Leo eat it instead.
The scene was reshot about 70 more times to get the version we saw in the film, which meant Leo had to eat 70 pieces of sushi in one day, leaving him with one hell of a gut ache much to Hill's (and Scorsese's) delight.