Well, this goes way back to the old old cantina thread. How it originally started in the very beginning, I don't know because I wasn't around back then. It had something to do with the vegetable gods or something, and I think you were supposed to say 'onions' when you stepped into the cantina, otherwise something bad would happen to you. Maybe somebody else who was there in the beginning could explain it. I remember Fyron putting in his sig, "when in the cantina, Fyron says onions" or something like that.
For some reason that I don't understand, somehow the rule mutated so that now when you say onions, a big pile of onions falls from the ceiling and buries the person who said it. This was the rule in two or three of the cantina threads that came after. It became a sort of traditional thing. The exact effect of saying the word may vary from cantina to cantina.
Well, with this latest Version of the cantina, the magic word has changed to the m-word, with new consequences.
