J, I only know that I would not have put myself in that situation in the first place. If your going to go out and enjoy the outdoors you should know what animals are out there and what the possibilities may be. If you go out there thinking your the top of the food chain and you own everything under the sky well, your in for some surprises in the great outdoors.
Given what I seen in the moments of the video and seeing just a little glimps of what happened. Dude was in the wrong. If you rev up an engine and clap and shout and the animal doesn't move, then why would you move closer? From what I seen, he was the aggressor and not the moose.