A deer. Ok, technically I didn't "run over" it, I hit it while doing 60 mph on the freeway and it "bounced" off my grill and landed several yards away on the left shoulder. Well, most of it anyway. Some of it stayed on my engine, radiator and inside what was left of my front bumper. But to be fair, I left an equal amount of my truck inside the deer - complete with the Toyota emblem. (and guess what ... turns out the deer was uninsured!)
A squirrel. I felt dam* horrible -- he or she looked so happy scampering across the road -- and then suddenly turned around and ran under my car! "Fa-lunk" was the sound from under the car. :(
A big ol' frog. Poor little guy, he jumped out right in front of me. It was raining hard, so I didn't try to dodge him. I just hoped he would get lucky but then I felt a little bump. :(