"Legend says that when the Primordials brought Creation into being, they took all the boredom out and stored it near to, but not within, the world it came from. Because it was so boring, though, no-one wanted to be there. So they took one last look at this big, empty place where nothing happens, and noticed that from the point of view of every living thing, it was: Elsewhere."

That's a joke I would have put in, but I felt it would confuse the people who actually need a real explanation of what Elsewhere is.