A herd of bison crossed the road and a small group of them started running. From my stopped car, I could feel the ground shaking! Then, two of them started to fight. They started to butt heads so hard, it sounded like roaring thunder! It was scary and awesome all at the same time. With all the traffic stopped on the road, I couldn't move my car. And hoped the fight wouldn't get any closer! A good reminder that these are wild animals, and WE are invading THEIR territory! Safe distance required!