Just watching a short clip it's hard to get an idea on what actually took place to put the man and bull together intimately. I can only guess that the guy on the bull had the first chance and missed or choked. In thick brush like that it could've just been a bull that was not seen by anyone until it charged. It's hard to tell but I'm certain the man that was tossed is happily thankful for the outcome. I hope he wasn't hurt too awfully bad in the encounter. Just a wild guess but the shooter might've been the guide. one thing we can be sure of; they didn't use the man as bait.