the wrist reminded me when i broke a glass jar and picked up the bottom of it, then my sister slammed her hand on it and i had a round circle open on my palm, if it didn't hurt a lot I could just take out the entire skin circle off it, I was around 7 years then, them good times

i nearly broke my leg jumping off the garage roof :] lots of fun climbing trees, not so much falling from em :] didn't happen often thankfully XD
I think your case with your knee was much worse than my knee where i could see the bone

your pain was quite different from mine, good to know it toned down a great deal, I don't recommend getting electrocuted though, not funny, though I did laugh every time

I also remembered another thing that happened to me, i didn't injure myself or anything, it happened twice honestly, first time was when I fell into the well head down, nearly drowned myself, though neither me or anyone at the time knew how I got out of it, it was so cramped rolling around and changing position was impossible for me, have no idea how i menaged, maybe I instinctively bended my body parts (legs and arms) to work around it, was young so it was possible, I was very flexible back then, not so much nowadays,
second was much easier, I was with my cousin at the center of the lake fishing on a raft we built ourselves, sturdy thing, i fell in the lake and got grabbed by a branch or something that was someplace there and could't swim up, I think my shorts are still there heheh, unless someone fished them up

was scary though.