I was in a parking lot at the Rocky Mountains National park. Some dummy rolled backwards and bumped right into my US version bumperettes as I was in the car setting up the next destination in GPS. It pushed me forward a few feet. I jumped out and looked at the damage, and there was none. There was a dirt mark on the umperette, that wiped right off.
It was a good thing they were on there, or I would be in jail still.