Ice flies off your car, hits mine...who's at fault?

hardly the case at all…that shit flies 15 to 20 feet up, and slowly comes down…drop a sheet of paper and tell me how fast it falls…obv ice is a bit faster, but a big sheet won’t drop that fast…i’ve been a good clip behind people and still had ice end up going over my head.

my biggest concern would be how do i go about going after the person…even if i do get next to them, get them to pull over, and try to get a police report…they can always deny it and it becomes the usual one person’s word vs the other