First time I fell off I was 9ish and was riding a friend's QH gelding. Well friend's father decided, while both of us were almost sleeping on the horses' backs (we had pillows and everything), to disconnect an air hose which made a loud 'shhhhhtt' noise and the gelding backed up like a madman. I slid off, then held onto the reins (a lead rope connected to the halter), and was drug for quite a few yards on gravel until I either let go or he stopped backing. I can guarantee that if I were a few years older, I probably would have made a loud 'sht' noise, too.
Nothing bad but a sore butt and some road rash.
Any others were thanks to my own gelding, who I got as a 10 year old, and he was just 3 and green. I had been taking lessons for years, but no child that young needs a horse that young. We did grow up together, but I seemed to spend a good lot of time laying in the dirt.
First with him was riding at home, out in the field trying to trot. He did a bit of a crow-hop and I plopped off on my left side and sprained my arm. Moe casually walked away and I ran inside crying my eyes out that my arm hurt. Parents told me to go get the horse, but they ended up getting him. I'm pretty sure he was just in the field grazing on alfalfa. They took me to the hospital after that and after having my arm man-handled on the x-ray machine they concluded that it wasn't broken. It probably wasn't even sprained before they got a hold of it!
Next with Mr. Moe was riding at home, again, around the yard. Mr. Business was having a bad day and decided we ride under a tree that he couldn't hardly make it under. He reared up and I flopped off, left side again. Landed on my hip, then stood up to avoid getting trampled. My mother went to grab Moe, then told me to lay back down so I would hurt myself further. I couldn't get back up and had to be taken to the hospital via ambulance. Got an MRI and X-rays and they just concluded I bruised my hip.
Since then I have slid off bareback whilst riding Moe, but mostly my own fault. Mostly. (I know Moe had to be cooking something up in that brain cavity of his.) I have fallen off on my left side 100% of the time, and still am all messed up from that. (I have balance issues, and my saddle always slides from me putting more pressure on my right side. Plus random bouts of hip pain if I do to much walking around in a day.)
Being a born Wisconsinite and practically raised on cow milk alone, I am fairly sure my bones just won't break. I've never gotten a cool cast or big purple bruise to show off, just a splint and a limp. Not that I'm inviting anyone to prove me wrong, but I gotta say one of these days I want to be able to point to a bruise or a scar and say "You know that beautiful Appaloosa out in my pasture? HE did this to me!" Although said Appy has grown up a lot, I'd hope not to get anymore injuries on his part.