Billy Bob Thornton and co-star Seann William Scott injured themselves during a wrestling scene for their latest film.
Neither actor had remembered to warm up before shooting the scene, for forthcoming drama Mr Woodcock, and ended up suffering for their art.
Scott explained: "All of a sudden we're grabbing each other and it was very bizarre. It was two days of throwing each other around and he was really just kicking my ass. I'm not a stunt guy, so I don't know how to go down without being injured, so I came away with a really bad back, and he came away with a broken foot."
Thornton (pic) added: "I didn't even realise it was broken. I walked around on it a couple of days and I knew something was wrong, so I finally went to the doctor and he said, 'Hey, your foot's broken.' He just kind of wrapped it real tight and gave me a bigger shoe and we finished the movie. I didn't take any time off."
But Thornton, who enjoyed a volatile marriage to Angelina Jolie until a couple f years ago, said it wasn't the greatest injury he's suffered on a film set: "I've been hurt much worse in movies before. I've had a broken collar bone, six broken ribs, and a cracked pelvis."