Maaaybe it's something that the characters refer to that has meaning, like an omen of some kind, like they're waiting for the guy on the tricycle to appear to trigger something or he was said to have brought good or bad fortune (like the Pocked man in the Farseer trilogy, Have you read that? It's awesome!!) but who just turns out to be a traveling penis puppeteer?...
Oh god, what have I done! : ( x