It does sound unusual, Mr Nobody. Something similar happened to my Grandad. Where there was a big storm. I forget the name of the storm. Storm Buttercup, maybe? But something flew off my Grandad's greenhouse and hit the car next door. I remember it went down something like this:
Car dent guy:
I want compensation!
Grandad:
It was an act of God. (aka Storm Buttercup)
I don't remember it going any further than that. Unless my Grandad compensated him with some tomatoes. And possibly lettuce. Although I could be wrong about the lettuce.
Anyway, it's good to hear that it's been resolved!