If a horse bucks the rider off , she is often torpedoed head first to the ground .
A fall from just two feet can cause brain injury , yet when sitting on a horse , the rider 's head is at least eight feet above the ground .
If a horse bucks the rider off , rider is often torpedoed head first to the ground .
A fall from just two feet can cause brain injury , yet when sitting on a horse , the rider 's head is at least eight feet above the ground .