A few examples in chronological order.
Example #1: Way back when I was first learning to ride (4th grade, eons ago), I was standing next to the horse’s shoulder while the instructor showed my how to tack up. She pulled up the girth and the horse reached around and bit my ear lobe. A bit of blood and a freaked out mother, a doctor visit, a tetanus shot and an apologetic instructor later, I learned where/how not to stand, and to pay attention to the face when girthing. I don’t remember how the horse was able to reach me. I don’t remember if I was holding him or whether he was tied much too long. That was back in my pixie cut days so my lobes were quite exposed.
Example #2: When I was in high school I had gone with some friends to a stable where you could rent horses. Friends and I were riding in a large field and my (rented) horse stopped behind my friend’s (rented) horse. Friend’s horse kicked at my horse and nailed me right on my right knee. Knee cap in the center of the horseshoe. We were both mounted, so that was a pretty lofty kick. I was limping for the better part of a week and had one heck of a lovely bruise for it.
Many years later, turned my senior horse out in the round pen to get some of his ya-yas out of his system. He was recovering from one of his many injuries. He wheeled around and in all his excitement let fly with both (shod) hinds. On nailed me on my thigh right above the knee. I heard a loud sound (cross between a crack/snap/slap) and was on my butt wondering if he had just broken my leg. Luckily not. Just one hell of a lump, a serious limp and an absolutely stunning bruise. Probably good that I was wearing jeans. My right leg again.
Example #4: Climbing off the current horse who is all of 17 hh, I dropped to the ground and felt something happen in my left knee. Not sure what it was because I never went to the Dr. Just limped for months and didn’t ride for a while because I couldn’t bend the knee. It’s pretty much better now but it has some bad days. It’s been 5 years. I still can’t run on it. Putting my horse and tack away was a real treat that day. Tack room was up a flight of 11 stairs. It took a while to do. Horse did absolutely nothing.