I was riding a green TB belonging to a friend. On one day we had been walking on a long rein with no big problems, so I shortened up the reins a bit to trot. Instead the mare threw her head down forcefully. I didnt let the reins slip quickly enough and was thrown forward. She then whipped her head back up, hitting me in the face with her neck! She reared several times without rein contact, with me just trying to stay on and see through the blood spattering in my eyes. When she stopped I jumped off. (we never did figure out why she did this. If she was stung by something we couldnt find any evidence)
The owner was distraught and provided ice and tea (yes, she was English!). I then drove myself with a Sesame Street washcloth holding ice on my nose. The folks at the walk-in clinic took a look at me and started treatment even before I did the payment paperwork, so I looked pretty bad!
I had a broken nose and three stitches. By the time I went to work the next day I also had two black eyes.
But I didnt fall off!