Model Jourdan Dunn Fashion Week Fight Breaks Out! Friend Takes Down Photog

9/22/2015 6:49 AM PDT

London's Fashion Week turned into a contact sport when British model Jourdan Dunn ended up in the middle of a brawl ... complete with a nasty knock down punch!

Dunn and a couple of male friends were cruising out of Loulou's nightclub Monday night, and it appears a photog pissed off one of her pals. It's unclear exactly what started the fight, but check out the video -- it is crystal clear what ended it.

Let's just say, Jourdan doesn't need any bodyguards with friends like this.