"Shared Hallucination"

A minute passed. "Maybe you should press the button again," said Addison. "I would, but I'm afraid of upsetting that John Henry fellow," said Milford. "Oh, right," said Addison. "We wouldn't want to do that." "We're lucky he let us in there at all." "No, yes, you're entirely correct." "How about if we wait another minute, just in case he didn't hear the bell, and then we'll press the button…