Now there's not a lot of Ice Hockey in the UK, but an old friend used to play, and a puck came through the glass screen and took out his wife's top lip and most of her teeth.
None of my friends have been injured in motorsport, either spectating, marshalling or competing, although there have been a few misses, and I have seen the ambulance out a few times. (My nephew did crash a kart at a social event, and it was the damn helmet that cut his chin.)
I'd like to keep it this way but not at any cost. Flying can be dangerous, but we still do it.