YMMV / The Simpsons S 4 E 17 Last Exit To Springfield
Franchise Original Sin/Seinfeld Is Unfunny: Much like "Marge vs. The Monorail," this episode, when viewed these days, has all the elements (here still kept under control to the point of not really being flaws) that would go completely out of control later and become hallmarks of the much-maligned latter-day episodes (celebrity cameos, Homer being cartoonishly stupid, repeated jokes added to pad out the show, and the Family Guy-esque Imagine Spots).
Fridge Horror: Mr. Burns mentions that he has a tendency to end tours of his home with his (rather ordinary) basement. Given that several episodes show him being able to have people killed without consequence, that casual remark suddenly has frightening implications.
Harsher in Hindsight: O.J. Simpson was offered a cameo role in Kent Brockman's news panel, but declined and was replaced by Dr. Joyce Brothers (whose only line was, "I brought my own mike!") Given the infamous O.J. trial that would happen years later, the writers actually were thankful O.J. was never brought in as a guest star, so on the one hand, the trope was averted because O.J. never appeared on the show, but on the other hand, hearing the information and wondering What Could Have Been will leave a bad taste of Fridge Horror in one's mouth.