Honestly, there are times when we read articles like this and just shake our heads.  The photographer obviously got too close, which threatened this bull and the members of the herd he cares about, and he instinctively responded by charging the predator–which is how they see humans.  Know what would have happened to this bull if he’d injured the stupid photographer?  Right.  The bull would be dead now for protecting the people he loves.  http://www.dailymail.co.uk/news/article-3030109/Charge-heart-stopping-moment-angry-bison-decided-assert-dominance-hurtle-photographer.html