Per Ozark Bicycle:
1) My head struck on object (pavement, vehicle, another cyclist, etc.)
whilst cycling; I was wearing a helmet and I feel the helmet lessened
the extent of my injuries.

You didn't specify bicycles-only sooooo....

Drunk clipped me on my Yamaha YDS-6 when I was doing about 45-50 mph.

Did a swan dive over the bars and through the air onto the asphalt.

Cracked a perfectly good Bell cop-style fiberglass helmet, saw flashes of light
intermittently for about 2 days, probably paid my dentist's kid's way through
college.

GF's employers put me up for a couple days and fed me something from Canada
called "2-2-2's". Aspirin-like tablets with like 2 milligrams each of
caffeine, aspirin, and codeine IIRC. Great stuff for getting a night's sleep
with road rash.
--
PeteCresswell