I had lots of allergies when I was a kid, and since I couldn't drink milk, I had to take calcium tablets. Probably why I never broke any bones, although I had at least 3 concussions and around a hundred stitches by the time I was 8.
Then I learned to weld and use a cutting torch, got burned (not owies, but where you can smell the skin) several times, and had lots of stuff fall on my head, and got cut on stuff we were working on.
Plus the cows... they'd knock you around sometimes, too. And I wore glasses, so if I was looking where I was walking, the frames made a blind spot about forehead high, meaning I walked into limbs, lumber, steel....
Once I slipped and fell from the top of the hay stack onto the back end of the hay truck and bounced off onto the ground, with a bale of hay landing on top of me. I sat up, found my glasses and stood up. My dad then said, "Careful - you'll fall." A common phrase of his was, "He's okay. It just hit his head."
My mom would have had fits for most of the stuff that happened, but my dad helped keep it in context. :-) And I learned how to get out of the mess and bandage myself, and most importantly, not panic.