When I was five, my dad was putting up a suspended ceiling in our basement (where you assemble pieces of metal in a framework and drop ceiling tiles into the formed 2x2 squares). He was using a chair as a sawhorse to support the metal pieces, and would cut off whatever length he needed for each section. He specifically told me to stay away from that area where he was working so I wouldn't cut myself....
I did mention I was 5, right?
I managed to catch my arm on the cut end of a piece that he had left tipped up against a chair. I don't remember the pain, but I remember the blood. I thought he would be mad because I didn't listen, so I ran off to... try to hide? bandage it myself? I don't really remember what I thought I was going to do.
Needless to say, he saw my blood trail and found he in an upstairs bathroom with my arm wrapped in a towel. I had a nice 3" gash so deep you could see tendons or ligaments.
The first time I remember it hurting was when they gave me numerous numbing shots to sew it up. Burned like FIRE.
During my early 40s, I borrowed a little 5 foot step ladder from my mom to wallpaper inside my pantry. It was just a little lightweight thing, super easy to carry. When I was finished, I took the ladder out to put in the back of the truck. All I did was set it in the back. And I felt/heard this pop in my right calf, and just dropped on the spot. It hurt soooo bad. I crawled to the back door and up the three steps, opened the door on my knees to get inside. DH found some crutches in the attic of the garage to take me to the ER who sent me to an ortho. Final diagnosis was the plantaris muscle in the back of my calf had snapped. The ortho didn't feel it needed fixing (stated it was a vestigial muscle - not something you "need" to walk - possibly offering more of a sensory function to the foot?). The pain eased quickly, and I was back on my feet within a week. Just the strangest thing I've ever experienced.