I guess we had one this summer. The road from home to the spot we normally stay at is two lanes. Coming around a long turn in the road I see the grill of a chevy passing a large cube van. There was just enough room for us to pull to our right so the truck could pass between us. It was also pulling a trailer. Truck and trailer somewhat smaller than us. It would have been one heck of a mess.
If I could have turned around and followed I would have. Then I thought the grief he would be getting from the passenger would probably have been enough.