An alien was having a bath in the green washroom of his green house when the doorbell rang. He wrapped a green towel around his green body and went to open the green door. As the saleswoman was about to introduce herself, the green towel slipped from the alien's green body and left him naked. The saleswoman was so shocked that she screamed, ran across the road and was knocked down by a truck. What is the moral of the story? Don't cross the road when the green man is flashing.