I felt that you used too many unnecessary clips, which increased the length to the point where I became bored at points; e.g. is it really necessary to show you running away from two zombies? You also seemed to repeat many of your nade-throws, and mutagen is a no-no.
That said, I really enjoy your running style; it's incredibly smooth and seems very natural, but at the same time very effective.
Good job and good luck with future projects.