I would call it talking out of your ass in various threads.
But that is just IMO 
PT
I might Almost agree that hes firing blanks. Either they got lucky, or it took alot of takes. Because if they monkey would have raised the angle of the gun it would would have faced Them straight on, aand then they would have to re-shoot everything. Since its obviously planned for them to run and not to play dead.. So thats the first thing.
Second this is The incredible high noise that I would assume would freak a monkey the fuck out. But maby not if they're trained I guess?
And the noise seem to be always at the Exact same pitch? (and since they camera man is moving it should Slightly change at least?) If I really cared I would download the clip, open in vegas video and see for myself, but Im too lazy.
The editing process for that would be super easy though, Just mask the gun and move it sligly back/forward for a few frames, add muzzle flash and sound =)
And that would probably be easier then making him shoot bland and not aim At the "soldiers" but only below. And since its made in a professional film studio they would rock that shit witnin a minute. So I dunno
