Matt Damon put James Corden through his paces as his stunt double in a brilliant new sketch for The Late Late Show.
The good-natured action star poked fun at the stunts in his latest Jason Bourne film, forcing James to take a punch in his place, fall off a building and get hit by a train when he lands him a role in the movie.
Abusing James' obliging nature, Matt says to the camera: "Stunt men are expensive. James looks like he can take being punched in the face.
"This can't be the first time he's been punched in the face, he has an extremely punchable face."
Throwing himself off a building without crash mats below to make the stunt look more realistic, James can be seen painfully emerging in a fake neck brace.
"I've shattered my elbow, I'm sprained my neck, I've dislocated my penis, which I didn't even know was possible," he complains, begging Matt to let him stop.
But there is no relief as Matt persuades him to do one final stunt - get hit by a train.
"It's sad what happened to James, but he died doing what he loved to do," says Matt solemnly.
"He didn't die? Hang on, that means I still have to do his show? Damn it," he adds at the end of the funny skit.
Appearing on The Late Late Show on Tuesday, Matt revealed how he treats his real stunt men on the Bourne movies.
He told James: "I usually end up accidentally punching them.
"I said to the guy, for every time I accidentally punch you in the face, I'll buy you a bottle of champagne. At the end I owed him a case of champagne.
"That's basically my average on the four movies, 12 bottles of champagne."
But he revealed French co-star Vincent Cassel in the latest film was not on board with the deal.
He said: "He had no interest in my champagne, he was just like, 'Matt, just don't hit me in the face.'"