Well, there happened to be a very shiny piece of plastic, and the sun was shining just so and it scared the living crap out of my already rushing pony. I am fairly sure I went about 10 feet off of her into the air, but somehow or another I landed right back in the saddle and got my stirrups back.
I was great-full but at the same time her poor back! I must've landed hard.
She didn't purposefully try to throw me from the way it felt, just the way she spooked I guess. She settled down after that though and all was well. :b
Though her logic in what is scary is ridiculous. We had previously ridden past a bunch of snarling dogs trying to nip at her legs and she just kept walking like there was nothing even there.