I had a very well bred,gorgeous but crazy gelding. He went on to be an endurance champion, but I started him under saddle and after 6 months I could w/t/c gallop bareback with a string around his neck, %90 of the time. The rest he would buck, pitch hissy fits or otherwise be a huge diva. I had a buyer coming out and I had explained his issues. He bucked me off half way around the arena They still loved him and bought him, but man was that embarrasing.
I had an arab mare side step over top of me to protect me from some rowdy geldings that were running straight for me. It took me a minute to figure out what she was doing, but I've never had a horse actually defend me before.