Most animals seems to turn back and get run over for some reason. The only reason I can see is that when they see the car coming they get scared and they don't know whats on the other side of the road, but they do know that it was safe where they just were. So they decide to turn back. And then they get it because you never expect them to do that...because people don't do that. I think animals just think different.
I ran over a rabbit once...it just darted out, I didn't have a chance. I tried to swerve to straddle it (was the best I could do on a narrow road) but it turned and ate it under the tire. My girlfriend was so pissed, she thought I had swerved in order to hit on purpose! I felt terrible.
Another time I was going like 60 on some back roads, and a squrril does that stupid turn back thing. I didn't even try to swerve because it would have been pretty dangerous. I looked back in my mirror and I see the squrril rolling around...then he plants his feet and runs across the road. I must have missed him with my tires and the wind from my car sent him for a ride! Lucky little bastard.
***Funniest thing involving roadkill that happened around here. Some one hits this huge beaver right by my house. It was a really big beaver and it was right over the crest of the hill by my driveway. So you couldn't really see until you were already upon it. I understood how some one hit it in the first place.
So the beaver rots there for like a week, in the middle of the road. This kid from my highschool is driving his mom's car by my house, when he comes up over the hill he sees the beaver in the road and trys to swerve to avoid it. My road is narrow and it drops off pretty sharp on the sides. He went off the road and totaled his mom's car...trying to avoid hitting a beaver that was already dead!