A champion show jumper is about to enter an important competition on a new horse. The horse’s trainer meets him before the race and says, "All you have to remember with this horse is that every time you approach a jump, you have to shout, "ALLLLEEE OOOP!" really loudly in the horse's ear. Providing you do that, you'll be fine".
The rider thinks the trainer is crazy but promises to shout the command. The race begins and the horse and rider approach the first jump. The rider ignores the trainer's ridiculous advice and the horse crashes straight through the center of the gate.
They carry on and approach the second jump. The rider, somewhat embarrassed, whispers "Aleeee ooop" in the horse's ear. The same thing happens -- the horse crashes straight through the center of the gate.
At the third jump, the rider thinks, "It's no good, I'll have to do it" and yells, "ALLLEEE OOOP!" really loudly.
Sure enough, the horse sails over the jump with no problems. This continues for the rest of the competition, but due to the earlier problems the horse only finishes third.
The trainer is fuming and asks the rider what went wrong.
The rider replies, "Nothing is wrong with me -- it's this bloody horse. What is he -- deaf or something?"
The trainer replies, "Deaf?? DEAF?? He's not deaf -- he's BLIND!"