It's about two men involved in a horse deal. One man is trying to sell his horse to another man and he tells the man that the horse he is trying to sell is a religious horse. And if you want it to stop you have to say, 'Amen'. So he gets on to try the horse. The horse doesn't move.
Horse stands still.
And the horse takes off like lightening. And she runs fast. But then as they are galloping along the man notices that they are coming up to the edge of a cliff. But the horse keeps going. But the horse keeps galloping.