I have this 9 year old girl taking lessons with me, and at her very first lesson, very first time on a horse EVER, I help her mount up, and almost immediately, the horse shakes, like the big, wet dog shake, and she screamed at the top of he lungs for the entire duration of the shake. The whole ranch turned and looked at what was happening. I held my breath as I tried to contain my laughter, and calmly explained to her what happened. Bahahahahaha! Ohhhh my. Lol