Yep, "Our Place" nailed it. Before taking the fiver over to a campground near Richmond, IN, we drove over in the car. Following a truck on westbound I-70, we saw him hit one of these potholes, and he was all over the road for a couple of hundred feet. The next weekend, we towed the fiver over to the campground, but knew where the hazards were, so we were able to dodge them.