Yep I was the dummy with the rental car window down videoing this brute in Yellowstone
He was not moving for anyone and ended up down the road in a big wallow that I am guessing he owns!
At least you were smart enough to stay in the car unlike some of the morons my wife and I watched get out and walk very near to them and also some big bull elk.
Beautiful place for sure....enjoy.
Also, if you look hard enough you will likely see a grizzly or two. Watch the elk herds that are grazing in the meadows around the river and if you see them acting a little nervous then stop and get out and glass real hard. I saw 3 of them in 4 days in the park and 2 of em were MONSTERS.