1974 Buick back in the days when the bumpers wood collapse, ex got hit from behind by dump truck, folded the trailer hitch vertical. Course I get call that the whole back end is crunched in, by the time I got home the bumper had returned to normal just the hitch was smacked. Magic fire wrench and a BFH fixed that.
The funny part about the whole deal is the donkey next to me had it in the shop for another issue. I don’t think he even saw it as it went out without being touched!
I don’t think it was a backed into situation. Looking at it I’m pretty sure it got caught on something. I’m sure the driver felt it! If they didn’t they shouldn’t be driving. Most likely a new person was put in that truck cuz nobody wants to drive an attenuator!