some time ago, that deer are the number one killer of humans in the US. No other animal kills us like the deer when it jumps in front of your vehicle.
While I was living in CO you had to constantly be on the lookout for them. . . especially at night, as well as the MUCH larger elk that frequent the area, too. Buddy of mine slammed into a doe one night with a VW bug. Lucky for him it didn't come into the front seat with him - I guess that's the worst situation. Animal in your front seat, injured and thrashing to get away. . . can do lots of damage.
And then there's the story of another friend driving through NM late one night - and hit a steer! Really honked up his car - and he couldn't even keep the meat.
