I had one of those big erasers that stuck to the end of a #2 pencil after the tiny eraser wore out. It never fit right so I thought I'd just force it on by banging it on the table (you can see where this is going). Two hits worked fine, but on the third I lost my grip. The pencil stayed upright on the table and my hand banged back down on the point. I pulled it out of my hand OK, but the lead left a trace of black where the point stuck in. Nothing in there but a trace of lead and a funny little black mark.
I don’t recall the exact details but I think I was in the first grade so only 6 years old. I seem to remember metal chairs with holes in the seat and some kid had stuck a pencil through one with the point up, and I ended up falling over onto it. Memory is very fuzzy, but the memory of looking at my elbow and seeing a broken tip embedded there is very clear. The top layer of skin healed over it and it was visible under there for years and years, well into my adulthood. I eventually forgot about it and then one day noticed it was gone.
Why didn’t I go to the teacher with my “injury” and get her to dig it out with tweezers or something? I was a stupid 6 year old. Never occurred to me. 😂