Totally awesome from start to finish, but in an effort to have some small critique, I would say that the action is too evenly paced and the falls too "regular". Something to "rattle" the flow would give it more realism, either some camera shake, or a character getting dazed by an extra-hard fall, something to break up the steady pacing. But if you were to leave this sequence as it is, it would be more than acceptable for a finished shot.