The Preacher's Horse

A preacher decided to sell his horse so he put an ad in the paper. One day a man came by and said sir I would like to buy your horse. The preacher said okay, but I must warn you he only understands "church talk". The man being slightly confused replied, What do you mean "church talk?" The preacher said, "to make him go you say, 'Good Lord,' and to make him stop you say, 'Amen'" The man says I've never heard of that, but I'll take him. Later on the man decides to ride his new horse. He climbs on and says "Good Lord". The horse begins to walk. The man says "Good Lord", and the horse begins to jog. The man says "Good Lord", and the horse starts to flat out gallop. The man looks up ahead and sees the edge of a cliff getting closer to him. The man begins to panic and cannot remember the word to make the horse stop. Finally at the last moment he remembers and yells "Amen!" The horse slides to a stops at the edge of the cliff. Relieved the man says, "Good Lord!