1) I was on my way to the doctor with rear end trouble when my universal joint gave way causing me to have an accident.
2) The guy was all over the road. I had to swerve a number of times before I hit him.
3) The pedestrian had no idea which direction to run, so I ran him over.
4) I had been driving for 40 years when I fell asleep at the wheel and had an accident.
5) An invisible car came out of nowhere, struck my car and vanished.
6) I was thrown from my car as it left the road. I was later found in a ditch by some cows.