I didn't do this one but nearly threw up at the sight.
About ten years ago racing wide touring cars (ah the days
) one of the guys running F1 at that race drove straight into a marshalls foot. The marshal was wearing sandals and the F1's front spoiler took the guys toenail clean off. The race was stopped because the poor guy was rolling around on the straight holding his toe...
My mates dad took a predator (the old one with the pointy nose) in the knee and cracked a kneecap. Ouch!