It had to be Montana. It does look like Yellowstone. I almost had the same thing happen outside of Boston. There is a parkway or turnpike that didn't have warning signs before getting on. They resurfaced the roads, but didn't think of the clearance of the rock arches of the overpasses. Fortunately, a good driver got me to the side of the road and warned me of ahead and said to take the next off ramp. Also, he said, had a trooper seen me, I would have gotten a fat ticket. My stars were in alignment that day. I can't imagine all the roof damage, much less the sidewalls. Poor guy. Is he in the Montana Owners Group?