We're being invaded by fiction all the time.

Meeting Their Makers: The Strange Phenomenon of Fictional Characters Turning Up in Real Life | The Daily Grail: "Strangely, authors seeing their fictional creations 'in real life' seems to be a relatively common occurrence - especially in the worlds of science fiction and comic books. Alan Moore once mentioned in an interview that he once saw one of his creations, the mage John Constantine (from the Hellblazer series), in a sandwich bar in London. "All of a sudden, up the stairs came John Constantine," Moore revealed. "He looked exactly like John Constantine. He looked at me, stared me straight in the eyes, smiled, nodded almost conspiratorially, and then just walked off around the corner to the other part of the snack bar." Moore contemplated whether he should go around the corner and double-check if it really was his own character that had walked into the bar, or whether he should just finish his sandwich and leave. "I opted for the latter; I thought it was the safest. I'm not making any claims to anything. I'm just saying that it happened. Strange little story."

 Another person intimately involved with the Hellblazer series, artist Dave McKean, has also recounted a 'meeting' with a comic book character: Neil Gaiman's 'Death', from the Sandman series (which McKean created covers for). During the process of travelling to San Diego, someone died on the plane, and as he was waiting to board the plane again McKean says a girl dressed as Death walked off the plane and past him..."