I think it had to be something harder than another car. Some sort of barrier. The running board is a little ripped up, the rubber bumper strips on the doors are pretty ripped up, and there is a gouge in the metal on the rear passenger door that is pretty deep. If it were another vehicle, I would have expected to see rub marks from some sort bumper or guard or something on the other vehicle, with paint marks from the metal on metal causing the gouges. Whatever this was, was unforgiving.