I was about a story and a half high in a magnolia tree when I was about 10, and I had walked out on one branch, holding a smaller branch for balance.
I didn't realize the one I was standing on was dead, and it snapped at the trunk.. The small branch I was holding wasn't enough to hold my weight, and it snapped too.
The branch I was standing on bounced off the springy ground that was many years worth of shedded leaves, and it hit me in the lower back just before I was about to land on the ground.
It caused a minor fracture in a vertebrate, and caused me a lot of pain at the time, but I didn't complain because I didn't want to be "a little girl" (I had two unforgiving older brothers). When I was in 8th grade, I had my first back ache and had x-rays which found the childhood fracture which mishealed due to not being treated.
It still causes me a lot of trouble whenever I'm bent over for long or if I have a back ache.
Both of my hands have some scar tissue which gives me some trouble about 1/11 of the times I do a pinching/clamp kind of grip. Those injuries were from sticking my hands in a dog's mouth to pry his mouth off of my dog's throat last year. At first, all my might wasn't enough, and he chomped the fuck out of my hands.
Then my adrenaline kicked in and I pried his mouth open like it was nothing. I then kind of suplexed and wrestled the dog so mine could be taken to safety. I don't regret it one bit, but it was definitely a stupid thing to do.. but I can still play the piano just fine!
I also came dangerously close to losing an eye from a tooth or nail. It happened so fast I'm not sure what did it. Here are some pictures.