I have a friend who hit a horse that rolled over the hood of her car and came through her windshield (a big freaking horse at that)!
Friend of mine hit an elk a few years ago. Partially came through the windshield. It was nasty, but he was ok.
I heard of a six point jumping into a car window while attempting to cross a road in NW Florida several years ago. The male passenger was hurt badly by the hooves and horns of the very angry buck. Neither could get away from the other.
Back in the 50s, several of us were returning to college in the wee hours of the morning when we topped a hill, only to find the road full of horses. Our driver dodged all but one, which reared up -- and we hit its hind legs with the driver's side of the car. Its body slammed down onto the hood, its chest hit the windshield, and its head smashed the roof down on the driver's head. Then it flipped over the car and somersaulted onto the road behind us.
Our driver managed to maintain control and, with a smashed left headlight, managed to bring the car to a safe stop on the right shoulder.
The driver of the car following us said that his headlights suddenly illuminated a horse tumbling through the air, so he evaded it by veering off on the opposite (left) side of the road.
Following him was a pair of motorcyclists riding side-by side. They avoided disaster when one went left and the other veered right to avoid the carcass in the road.
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We noticed an oncoming car that had stopped a hundred yards or more away, and then slowly crept up to our location. The driver (who, apparently had had a few drinks) said,
"Damndest thing I ever saw: One car come over the hill, one headlight went out and it pulled off on the other side of the road. Then another car come over the hill, and it suddenly headed off into the ditch on my side of the road.But, when that third car come over the hill and half went one way and half went the other, I decided it was time for me to stop!"
A friend of mine hit a black Angus bull the same way. Crushed her face and she was laid up for about 6 months recovering.