These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
They actully do tie it into the strip, but always in the same way: It always turns out to be a book Curtis was reading.
Critical Research Failure: One story has a butcher that used to be a Disney animator who was laid off. The reason for said layoff was Pixar, which if you know anything about how Disney and Pixar work, is completely untrue.