Want a photographic challenge, shoot a cutting event. Those horses are after the steer with vengeance, power and grace all in one. The ground shakes as they pound it going from side to side. Then in a moment, and a slight hand from the rider, the horse stops and walks out like nothing was going on.
Totally amazing how anyone can ride such power and control, but they do and make it look easy. Looks can be very deceiving!