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Didn't you think that a wormhole is an analogy to the rabbit hole from Carroll's story? Maybe someone has something related to Alice?
I don't know. Then it would have been a rabbit hole. Here, the GM tried to organically incorporate the clues into the story, and he succeeded. The hobbit could have really backed away and almost fallen into a mole's burrow, and then the association with a wormhole - a cosmic object, so to speak - began, and it went on from there.
That's just my opinion.