"Funny Aneurysm" Moment: 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 in 2003. In the writers' defense, they knew this would happen someday (whether they were joking or not is up for debate) and were surprised when it did.
Nausea Fuel: The germs on Smithers' face and the prickly music accompanying it (though the germs saying, "Freemasons run the country" is kinda funny).
Values Dissonance: Was Homer teaching Maggie to gamble supposed to come as a shock? If so it'd be lost on a 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-cum-arcade centers, the only difference being Chuck E. Cheese is for kids and Dave & Busters isn't.
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 lose."