A preacher was trying to sell his horse. A potential buyer came to the church for a test ride. "Before you start," the preacher said, "you should know that this horse only responds to church talk. Go is 'Praise the Lord,' and stop is 'Amen.'"
So the man gets on the horse and says, "Praise the Lord," and the horse starts to trot. The man again says, "Praise the Lord," and the horse starts to gallop. Suddenly there is a cliff right in front of the horse and the man yells, "Amen!"
The horse stops just at the edge of the cliff.
The man wipes the sweat from his brow and says, "Praise the Lord!"