I've been rear-ended

I was rear-ended while driving our minivan last year. The other driver was in a rental, probably just picked up from one of the nearby lots, and IIRC in the middle of a phone conversation when he pulled alongside to see if I was okay. I was in the left lane preparing to enter a post office parking lot on the opposite side of the street; he failed to notice I wasn’t moving in enough time to completely move over. The van got a messed up bumper and a small dent in the liftgate whereas the rental’s crumple zone did just that.