We are on a trip on the Blue Ridge Parkway and somewhere in western Virginia before we got to the Parkway we saw what I think was a half ton truck and bumper pull travel trailer wrecked. I’ve seen similar pictures before, trailer on its side with the pickups rear wheels 18“ off the ground with the trailer still hooked up. A straight stretch of road, interstate, fairly flat. I‘m guess the trailer started wagging and he lost it. 3 lanes wide and he was blocking the entire highway except traffic could barely squeeze by on the inside shoulder. I think they were waiting for the big rig to clean up that mess.