Too many to count! The first I can remember, I was riding bareback and double. We were just starting to trot off and I bounced off. I didn't want to pull the other person with since I was in the back, so off I went.
Another memorable one, I was riding a friends horse and we were riding on the edge of the road. The horse got one back leg in the ditch and slipped. Spooked the crap out of him and he spun 360. All I remember was that I was left up in the air and when I came back down the horse had spun completely around. I landed on my feet next to him.
The rest I have been able to get back up and dust the dirt off. *knock, knock, knock* I think that's because I learned at a young age, being a stunt devil as a kid, to roll when hitting the ground.
Some of the things that have caused me to come off: loose cinch and the saddle slid, deer, motorcycle flying by, gunshot and a piece of paper that I pulled out of my pocket, haha.