This is pretty good. The imagery depicted is rather gory and heart-wrenching for both characters-the narrator and her unwitting victim. And it's so short, but tells a lot of the scene of the accident o: The first three lines were my favorite (:

If I may recommend a story title, you should simply title it, "Untitled." This piece reminds me of the Simple Plan song of the same name (or How Could This Happen To Me?). But it's merely a suggestion lol