When I lived in the mountains of Colorado there were quite a few instantces of elk chargeing hunters, atv's, and trucks. But I don't remember a single buck attack. I'll bet he had some type of scent on him that drove the buck crazy. That's where a guy needs to be packing a good fixed blade knife and start acting like he was Rambo!!!.... He's a very lucky camper that he didn't get squered in a spot where he bled to death before he could get out of the area. I'm afraid it would be a personal thing between me and that bruiser for the rest of the season.....bet I'd win in the end.....