NIB, you got stories too, man that musta hurt, your brain took a short nap and you paid the price.
My list is so long I could write a short book.
here's a few
Framing houses back when I had a strong back I was marking for strapping along the ceiling using a framing square in one hand and the pencil it the other walking along not even looking down since I am tall enough to reach the ceiling. Well you know what happens when I get to the fireplace hole in the floor

straight down I go to the basement and I fall flat on my back with my feet sticking straight up , my legs bent at the waist. My head landed 3 inches away from a pile of rocks that had not been spread out yet. good thing the cement floor was not poured yet or I'd be dead.
another time I was crouched and reaching making a cut and the gaurd on the crappy milwaukee circular saw did not spring back because of the weak ass spring they put in those things and a little sawdust gets in there, as I went to stand up on the staging I was falling back I just set the saw at my knee as you would to help yourself stand up and it is still spinning and cuts clean thru my quadricep muscle. Good thing the saw was set at 45 degrees or I would have no knee, missed bone by 1/8". 3 months out of work, 6 weeks in a cast and many months of therapy got me 80% use back with the leg.
I broke the handle on a 22 oz framing hammer also NIB. Also broke a prybar. Reminds me of jigging with conventional and breaking off in the canal and knocking myself out.
I also chipped my tooth nailing in a tight space, the claw got me.
I never got a skin graft when I had 4 fingers kicked back on a table saw across dado blades, still missing some of the middle finger, no wonder I can't type.
Framing a small addition to my house one day with a nail gun, I had a double shot and of course the second nail skimmed the 2x4 and went thru my thumb of the hand holding the board. Lucky for me my Dad was helping me so I got to get him back for the time I had to pull an awl out of his finger when he missed while poking holes in the bottom of a can. So the 16D nail is in my thumb and it's a Bostich which has those 2 pieces of wire holding the sticks together not plastic like some brands, and naturally the wire is in the thumb. He pulled it out and we finished the job the whole time my wife is nagging me to go to the medical center. I got there before they closed and got the tetneous shot so I don't know what she was so worried about.
there's more but I'll spare you