Lox, my father built roads in outback South Australia and told me of how a car he was following slowed to avoid hitting a Plains Red kangaroo; these are quite large (can stand 6'). It cannoned into the passenger side of the car and came through the side window; the driver just baled out without even stopping, as the kangaroo then panicked and leapt about with great strength inside the car trying to escape. There wasn't a straight panel left on the car, which was a write-off, even though it hadn't hit anything before it came to a stop off the road.

Kangaroos can be a bit of a problem.

Cheers, Rowan