This may be a stupid question, but was this purely a gag mocking Dale's chain-smoking habits, or was it also a reference to an old sort of accessibility device that used to exist back in the day?

This episode would have aired in 2002, and back then it really wasn't a gag in Texas for there to be smoking indoors in lots of places, but as the sign in the scene indicates, by law smoking had been banned in hospitals since 1975. So, it's not supposed to be realistic that a hospital of that era would actually have wheelchairs like that around. But maybe the creators from their youth remembered older people with these kinds of set ups, and the joke was supposed to be that the hospital had really old wheelchairs like this sitting around that did actually used to be around in the world.

Anyway, sometimes a cartoon joke is just a cartoon joke, but a lot of "King of the Hill" is deep cuts of real life stuff, and it would be cool to know more about this one if that's so.

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