Normally when I see something like this, I just tell everyone to move along. Nothing unusual to witness here. However, for some reason unknown to me, the internet is obsessed with a Yellowstone bison who has found himself the perfect itching post.
If I told you that a couple of guys decided it was a good idea to pet a bison, you would probably guess correctly what's gonna happen. It did. One man's offer of friendliness to a bison resulted in him getting the head butt of a lifetime.