We had a clinic today at the barn and I was riding with another fairly new rider in the arena. I was in a corner of the arena and my horse was facing the other way when the other rider started coming close towards us from behind. The horse I was riding was being cranky and decided to start bucking & kicking at the other horse (with both hind legs). I was not expecting it at all BUT I stayed on and my feet didn't even come out of the stirrups.
I must say it was a little scary at the time, but also kind of fun haha.