In my 3 years of riding I've only technically fallen off once, and that was not too long ago when I was doing an in and out jump thing (it wasn't pretty the first few times we did it) and at the end my horse went one way I went the other.
But years before that, when I wasn't into horses at all was when I had my first real fall. We had too horses and we had two people on each, and we were riding beside the rode. Well, a motorcycle comes flying by, and I swear he sped up on purpose. It spooked the other horse, he spun around and so our horse did the same and I landed on the cement road. The skin on the palm of my hand got ripped away and it was sprained, not to mention other small scrapes and bruises. So there we were, all four of us dumped on the ground, having to walk back to the barn (the horses went straight back there, we weren't far)
Good thing my mom was there though, she caught them and then came to pick us up.
My horse has fell 2 times when I was on, but I don't really count those lol