* TheCatchPhraseCatchesOn: While in the US, the "Batman Smells" parody song has pretty much always been sung the way it was in this episode, in the UK, there are several regional variants, most of which use the lyric "Robin ''flew away''"... until this episode, which singlehandedly shifted the cultural zeitgeist for a good 15 years, until the all-consuming influence of ''The Simpsons'' on pop culture ended and the regional variants reasserted themselves. Creator/TomScott [[https://www.youtube.com/watch?v=V5u9JSnAAU4 explains]].
* HarsherInHindsight: The Siegfried and Roy expies (Gunter and Erst) getting attacked by their white tiger, Anastasia, would become a reality when Roy Horn got attacked by his white tiger on October 3, 2003. In the writers' defense, they knew this would happen someday (whether they were joking or not is up for debate) and were not surprised when it did.
* HilariousInHindsight:
** Bart [[StartMyOwn starts his own casino]], with TabletopGame/{{blackjack}}, but (presumably) no hookers, before fellow Matt Groening creation [[WesternAnimation/{{Futurama}} Bender]] names the trope six years later.
** This wouldn't be the only time Robert Goulet [[Recap/RecessS2E19YesMikeySantaDoesShave recorded a parody of "Jingle Bells"]].
* MemeticMutation:
** “Bart, I don’t want to alarm you, but there might be a boogeyman or boogeymen in the house!” followed by Bart's scream has been subject to all sorts of remixes on [=YouTube=] and Twitter.
** Replacing various monsters with Lisa in her Florida costume.
* NauseaFuel: The germs on Smithers' face and the prickly music accompanying it (though the germs saying, "Freemasons run the country" is kinda funny).
* UnintentionalPeriodPiece: Quite a few things date the episode:
** Special guest Creator/RobertGoulet died in 2007.
** Sears (where Homer had previously been caught stealing watches from) has had its popularity and ad revenue plummet in TheNewTens; as of December 2023, it's down to just 12 stores and is on the verge of vanishing completely.
** Siegfried and Roy (the magician duo who inspired the Ernst and Gunther characters) retired their long-running show in 2003 [[CareerEndingInjury after the latter's real-life tiger attack left him disabled]] (though the actual attack made the one in this episode relevant when it happened on October 3, 2003). And both men died with a year of one another; Roy Horn would die in 2020 due to complications from COVID-19 while Siegfried Fischbacher died of pancreatic cancer in early 2021.
** Younger viewers may have to look up who Gerry Cooney is and why Otto punched him out.
** Henry Kissinger appearing in this episode, considering that he died in 2023, at the age of 100.
* ValuesDissonance: Homer teaching Maggie to gamble may have been shocking to American audiences, but not so much to the British audience. British gambling laws allow minors to gamble, albeit on arcade games that dispense tokens and/or tickets to the winners, kind of like what America has with Chuck E. Cheese and Dave & Busters [[note]]For overseas readers, both Chuck E. Cheese and Dave & Busters are restaurants/arcade centers, the only difference being Chuck E. Cheese is intended for kids and Dave & Busters isn't[[/note]]. Unless it's by the seaside, in which case gambling with real money (albeit small stakes) is not only legal in the UK and parts of Europe but is a normal part of growing up, teaching kids the valuable lesson of "Don't bet what you can't afford to lose."
* {{Woolseyism}}: In the Czech dub, Homer's improvised breakfast contained dill dressing instead of Tom Collins mix.
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