When your horses do those fast spins - how in the world do you keep from throwing up or passing out???
I was watching from video last night on YouTube of some horses that were spinning so fast they could have created their own tornado's.
Does that affect the horse - dizziness wise? Pretty interesting to see.
I got to ride a reining horse (sans tornado spin!) once when I was a kid. It was just sit in the saddle and hold on. Horse did everything for you. Pretty amazing.