This happened to my uncles hunting moose in Canada back in the 80's
One lives in Vancouver, the other lives in PA Saskatchewan. I forget where they where hunting, but mostly they would just drive the oil field roads until the saw a moose, then shoot it as close to the road as they could. On this particular trip, they where driving a van with windows all the way around it. The moose came out of the woods to the side of the van while they where driving along real slow, and hit the van. They stopped, and he hit the van half a dozen times more, breaking out the glass on the side of the van, and the windshield. It all happened so quickly, that neither of them had time, or probably, the thought to get out and shoot the moose. Then it was gone.
My aunt sent us a clipping of the story in the news that included a picture of their van.