I heard a story by the Maharal (iirc), regarding a non-Jewish official visiting, and the Maharal showed him a vision of the 12 shevatim on the condition that he wouldn't laugh, and apparently when he saw Naftali (iirc) running, with his ginger (red) hair, he laughed.
I don't really remember any more details, but I would like to know the full story, and what the lesson in it was?