The theme prompt immediately made me think of the “Vl’hurg”/“G’gvunt” interruption from Hitchhiker’s. This event takes place either the first time you make a typo that the parser catches, or some number of turns, whichever comes first.
I first interpreted the theme in that way: some sort of David Lynch-like “uncanny moment” should happen to open up the story. But this is nice and open-ended, so it could be all sorts of things!