Tardibear used to tell us all that snakes were really derived from an all-powerful hydra who lost a fashion contest with the monkey kingdom, which is why they were coloured with such imaginative palettes as a reminder of who's boss. She then told me I was a snake- wait, what? Who scripted this? 

Invent a myth about a natural happening – for example, why does rain fall? Why do earthquakes occur? Why are rocks heavy, while clouds are light?