This happened to me once, but with a raccoon, and he wasn't so lucky..
It was 5:30 am one morning. I had just gotten my tbss like 2 weeks before. He ran out.. i got on the brakes (no traffic around) and I heard WHACK. Checked my mirror and its was motionless. When i got to work I looked under my car to try to see where it hit. That was when i found out that the previous owner had done a Magnaflow muffler swap (Its really quiet). Nothing i could do survival of the fittest, or the least stupid anyway.