I want to crit it, but I'm way biased against Fight Club, so I don't think could say anything constructive since I'm almost disgusted with the source material.
Alright, maybe I'll say something. The color is nice, the framing isn't bad, but I think it lacks a real coherent focus, much like the movie. Wow I'm so clever. Seriously though, maybe if the fighters were larger or more pronounced in the frame, or you made the observers static while the fighters were active you may get something more... dynamic from the shot.
On another note, if you're punching with your right hand you'd probably want your right foot back as leverage and your left foot forward for balance. Then you push with your right foot, hip and chest as you swing to put the power of your whole body behind it. The way you are punching now would be limp compared to the alternative. It's also dangerous to completely extend your legs at any point as a solid blow can strain/break/dislocate a kneecap like a cheap lego brick.