On our Australian transcontinental trek last year we came through Adelaide. Besides popping in at some friends (JackJack, Trax & Dazza), we also went past a box factory, I kid you not. The wife had through her work bought some boxes from them that she needed for a job and were so happy with the boxes that she wanted to buy some for herself. Whenever she mentioned the box factory I would say: "We just make boxes here". Even with her wide knowledge of Simpsons she didn't get it (and she has extensive knowledge, she had to pass a test before we got married) and I ended up buying the fifth season DVD box-set just to show her the "Bart Gets Famous" episode.
Guide: Many interesting and important things have been put into boxes
over the years: textiles, other boxes, even children's candy.
Milhouse: Do any of these boxes have candy in them?
Milhouse: Will they ever?
Guide: No, we only make boxes to ship nails. Any other questions?
Martin: When will we be able to see a finished box, Sir?
Guide: Well, we don't assemble them here -- that's done in Flint,
Bart: Have any of the workers ever had their hands cut off by the
Guide: No --
Bart: And then the hand started crawling around and tried to
Guide: No, that has never happened.
Bart: Any popped eyeballs?
Guide: I'm not sure what kind of factory you're thinking of; we just
make boxes here.