Until they culled about 10,000 Kangaroos on the army base I work on, 'Roo's getting hit by cars was a daily occurrence.
One afternoon I watched a young soldier who'd just picked up a brand new car crash into a fully grown male 'Roo, I stopped to help him, and he showed me that the odometer read only 29 Kilometers (about 20 miles) and the front end of the car was trashed!
I had one hop into the side of my work pick-up one morning, it had it's head down and managed to hit the left rear wheel, and it's head got caught between the wheel and the fender, spinning it around and breaking it's neck instantly, and I guess I dragged it 20 yards or so before I came to a halt. Not a good way to start the day, lemme tell ya!