This episode marks the first time one of Clancy Wiggum's parents are revealed.
As of 2019, this episode has the longest title in the series. The shortest title is a tossup between season 12's "HOMЯ" and season 25's "Yolo".
When Burns first calls Fernando Vidal, Vidal thinks that it is Marrion Barry and it is time for another shipment, referencing the former mayor's drug addiction.
When Burns crashes through the wall into Maggie's room, Maggie utters "Santa?" believing him to be Santa Claus.
Coincidentally, both Arnie Gumble and his son share similar names to dinosaur hosts of children's programs (namely, Arnie's name is similar to that of the character Arnie the Dinosaur from the film Nine Months, which was released a year prior to the airing of this episode, while Barney's name is similar to that of Barney the Dinosaur, whom the aforementioned Arnie the Dinosaur was partially based on).
German electronic band Kraftwerk have been referenced by Baron von Herzenberger as he electronic music parody of We Are the Robots.
When Milhouse's grandfather announces that he has driven his house to the school, the topmost two buttons on his shirt disappear.
During Grandparents' Day, as Mrs. Krabappel invites Grampa to speak, he is holding his oatmeal spoon in his left hand. Before and after, he's holding it in his right. When Grampa starts to sit at Mrs. Krabappel's desk, and during his nonsensical stories, the spoon has vanished.
Although Grampa's military unit was understood as the "Flying Hellfish", both the elaborate headstone and stationery letterhead read "Fighting Hellfish."
Mr. Burns is shown to have the strength to kick Bart halfway across his boat and Grampa's boat. This is inconsistent with his appearances in other episodes, where he is extremely weak and tires easily, although he could have summed up all his energy just to do that.
If the box Bart was in is closed then the water couldn't possibly get inside. If it could all the pictures inside would get wet and even ruined.
Lisa is shown with meat at the dinner table with the rest of the family, despite her claiming to be a vegetarian in the Season 7 episode "Lisa the Vegetarian". In the shot that focuses on Homer talking, the meat is not on the plate, which means that Lisa ate it. This episode could be taking place before she became a vegetarian. Also, it's possible that her "meat" is actually a vegetarian substitute.