Speaking of misfiring jokes, there are some that don't exactly misfire, but they do sputter a little, and no harm done. Take for example, the Brick Arm Guy, another memorable gag:
A lot of people seem to think this is a tip of the hat to Poe's "The Cask of Amontillado." I don't see why. It's hard to find anything in common between the two beyond the motif of being walled up alive, and even there it's different: There someone is doing it to someone else; here someone is doing it to himself.
Anyway, it's an amusing gag as it stands, but I think it's supposed to be a much more pointed punch line to a much larger joke. First of all, while other ghosts are "coming out" to socialize, this Oscar-the-Grouch ghost is trying to get away from all of that. Second, he stands in contrast to other ghosts in the same exact circumstance. I'll bet not one rider in a million catches the joke, though.
There are three bricked-up crypts in the graveyard that feature bulging, flexing brickwork. The ghosts inside are trying to break out. By the time you get to ol' Brick Arm, you're supposed to be expecting the exact opposite of what you see, enhancing the gag. You can see on the blueprint the three bulging crypts in purple, with Brick Arm in pink.
The first two are next to each other, right after the Royal Seesaw, and the third is up on the hill a bit, between the Hearse scene and the Mummy scene. Do you want what's behind Door #1...