Special kind of horse

A city dweller came to a farm and saw a beautiful horse. He decided he had to have the animal. He bargained with the farmer and the farmer finially sold him the horse. The city man jumped on the horse and said, "Giddyup!" The horse didn't budge. The farmer explained, "This is a special kind of horse. He'll only move if you say, 'Praise the Lord.' To stop him, you have to say, 'Amen.'" Keeping this in mind, the new owner yelled, "Praise the Lord!" whereupon the horse took off with great speed. Soon horse and rider were headed for a cliff. Just in time the rider remembered to say "Amen!" The horse came to a screeching halt right at the edge of the cliff. Relieved, the rider raised his eyes to heaven and exclaimed, "Praise the Lord!"