Can you imagine your self on a vacation in Yellowstone National Park siting in your car on an empty highway and enjoying the view.
Well it was the same like you imagine for this guys except they were watching bisons how majestically running along the road.
Then suddenly you realize that one of the bisons is coming straight at you. This guys tought that it will stop, but suddenly the bison violently hit their front bumper. Thats exacly what happened to this tourists as they were filming these untamed beasts.