I saw someone hit your car

Last weekend, I witnessed someone back into another person's car while back out of a grocery store parking lot in Boston. I won't give specific details, because I don't want to be a victim of stalking or another crime...lol. But I have to admit, I was a little paranoid, because I wrote down the tag and left a note for the owner of the damaged car, and did not want to be stalked by the person who hit the car. The car backed up, hit the front driver side of a new car, and the person who hit the