Reminds me of what happened to me, I was driving my prelude and ran over a black garbage bag, it got stuck under my car and burned up, smelled like nasty burnt plastic.
A few months after that I was driving the same car and saw a black plastic bag in the road, figured i didn't want to deal with the smell so I would drive over it with my tire. When I got close enough, I realized it was a cat, didn't have enough time to react, I flattened it. It was definately alive before I hit it, it totally looked at me. I'm guessing it was sick and tried to commit suicide, smart cat.