The jockey's whip is used to help horses run faster and maintain speed as they tire at the finish of a race. Whipping the horses repeatedly causes physical and psychological suffering and raises the risk of harm. The whip also serves as a signal for the jockey to give up certain tactics which are detrimental to the horse's performance. Horses hate being whipped and will try to avoid it as much as possible. If a horse does not want to be whipped he will walk or refuse to move when asked. The jockey must therefore be sure that his order is clear and that the horse understands what will happen if he fails to obey. Horses become agitated when they feel threatened and will fight back if given the opportunity. A horse that feels pain will try to avoid it by finding some other way to get around it. For example, it will sometimes jump over a fence to escape from someone who is hurting it. However, this can cause other problems because the fence might be too high or it could hurt itself when jumping over it. Jockeys are trained in riding schools to learn how to control their horses without hurting them. They also learn where on the body to hit a horse to get its attention without causing it injury.