Meanwhile, fans of Hugh Grant and Colin Firth's 'realistic' fight in Bridget Jones will pleased to hear that Reign of Fire (2001) contains a similar scene. Matthew McConaughey and Christian Bale decided that they'd try and make their fight in the forthcoming flick convincing. 'Matthew and I looked at each other and went, "Let's make it as dirty as possible and also let's really go for it,"' reveals Bale. 'Matthew headbutted me and I ended up with a huge welt above my left eye. Absolutely real. I hit the deck after he headbutted me, I stood right back up, I got in a genuine punch to get him back and we kept on going and played out the whole scene. At the end of it, I was fine; I wanted to know that he was all right. I'm very happy that's the shot that's in the movie.

Source: Press Release