There was once a holy man who had a horse. One day his friend asked the holy man if he could borrow his horse and he said, "yes." The holy man said, "Say Jesus Christ to make him go and Amen to make him stop."
So the friend was riding when he saw a cliff but he couldn't remember what to say to make him stop. So he said out loud, "Name of the father son holy spirit, amen." And the horse stopped right at the tip of the cliff and he looked over and said, "JESUS CHRIST!"