This is known by evidence found on the skull of the individual.
They were afraid to hit a man on the skull.
She held a large rock high over her head, ready to bring it down on his skull.
I feel its dear little feet running on my skull!
He heard a quick step next to him, then felt a blow on his skull.
Given the location, so high up on her skull, I'd guess this isn't from a fall.
"Though he will be in pain for the crack on his skull."
Instead, he raised his staff and brought it down on the creature's skull.
That must be how I got this lump on my skull.
But all I could remember was the fly crawling on the skull.