"I wonder how the moose was struck to end up positioned like that in the minivan? You think the minivan came up from behind the moose and it crashed hind-first through the windshield?"

The hindquarters are the heaviest part. If you throw something that has a heavy end and a lighter end, the heavy end will always lead.

Or, the moose and the car were going in the same direction, but the moose was slower.

Sue