Editing 500 Keys/References

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{{EpisodePrevNextRef|Homer Scissorhands|The Ned-liest Catch}}

== Cultural references ==
*When [[Homer]] flies off in the Duff blimp he shouts down to Barney: "When we see each other again, you'll be an old man and I'll be a baby," a reference to the {{w|twin Paradox}} in Einstein's {{w|special theory of relativity}} and the movie ''{{w|The Curious Case of Benjamin Button}}''. It is perhaps more likely to refer to Michael Moorcock's ''{{W|A Nomad of the Time Streams}}'' steampunk trilogy. Homer delivers the line from a blimp/airship which features strongly in Moorcock's central character's life: 'Oswald Bastable' was in turn borrowed from E Nesbit's children's stories.  
*When [[Lisa]] finds the hidden classroom in the basement of [[Springfield Elementary School]]:
**She says, "I've discovered a mystery wrapped in a riddle in the basement of a lousy school!" This is a reference to a speech by [[Winston Churchill]] at the beginning of {{w|World War II}}, in which he described Russia as "a riddle wrapped in a mystery inside an enigma".
**She observes that the stage is set for a production of the play ''{{W2|Endgame|play}}'' by {{w|Samuel Beckett}}.
**The objects in the classroom appear real, but on closer inspection Lisa discovers that they are fake. Near the end of ''[[2001: A Space Odyssey]]'', astronaut David Bowman finds himself in a similarly fabricated hotel room.
**There is a poster in the hidden classroom featuring the element symbols from ''Avatar: The Last Airbender''.
**Lisa returns to the classroom with a huge crowd and school newspaper reporters in tow, only to find nothing but bookshelves, similar to the [[Geraldo Rivera]] special ''{{w|The Mystery of Al Capone's Vaults}}'', where after a huge media buildup the vault was anticlimactically discovered to be empty except for dirt and debris.  This could also be a reference to "[[Grift of the Magi]]" where Lisa brings Marge, Homer, and Chief Wiggum to the school to show them the true intentions of the company that was running the school at the time.  
*[[The Pooter Toot Express]] (the wind-up toy which [[Marge]] and [[Maggie]] find) may be a parody of {{w|K-tel}} and its products.
*When [[Bart]] gets onto the window washing platform, the music playing is an {{W2|Inversion|music}} of the title theme from ''{{w|Peter and the Wolf}}''.
*During the blimp pursuit ([[Chief Wiggum]] and [[Lou]] in the [[Springfield Police Blimp]] chasing [[Homer]] in the [[Duff Blimp]]):
**Homer eludes Wiggum by suddenly climbing and flying over a billboard advertising a {{w|Cirque du Soleil}} performance titled "Zoomanity". Zoomanity was previously mentioned by Bart in the episode "[[Marge's Son Poisoning]]". 
**Wiggum crashes into the billboard and cries "Oh, the zoomanity!" as his blimp catches fire, referencing the {{w|Hindenburg disaster}}.
*When [[Otto]] drives the bus off the bridge, he wonders aloud whether they'll fall slowly, as in the movie ''{{w|Inception}}''.

== Trivia ==
*The [[Chalkboard Gag|chalkboard gag]] is a reference to [[Kristen Schaal]]'s name being misspelled as "Kristen Schall" in the closing credits of "[[Homer Scissorhands]]".
**This is the second time an episode's chalkboard gag has referred to the immediately preceding episode. The first was in "[[Homer the Heretic]]", where the chalkboard gag "I will not defame New Orleans" referred to complaints the show received about a song about New Orleans in the previous episode, "[[A Streetcar Named Marge]]".
*In the band room scene of the [[Opening Sequence|opening sequence]], [[Lisa]] plays a violin instead of her saxophone.
*A violin solo version of the [[Theme Song|theme song]] plays over the closing credits.
*When Lisa first finds the hidden classroom, a hamster ball with a skeleton inside it is briefly seen. Whether it's [[Nibbles]] or another hamster isn't known.
*The letters "RDRR" are written on the chalkboard in the hidden classroom, which is a clear reference to a classroom joke in the [[1990]] episode "[[Bart the Genius]]".
*[[Nelson]] carves his trademark [[Ha Ha!|laugh]] out of wood in shop class.
*Homer's car registration says "NABF14", the production code for this episode.
*One of the mannequins inside [[Bus 23]] resembles [[Janey]].
*The [[couch gag]] was re-used in the [[Season 23]] episode "[[A Totally Fun Thing Bart Will Never Do Again]]".

== Continuity ==
[[File:Homer's job keys.png|thumb|Homer's keys]]
*Homer has several keys from his previous jobs:
**Homer the Smithers ("[[Homer the Smithers]]")
**Bounty Hunter ("[[Sex, Pies and Idiot Scrapes]]")
**{{ap|Mr. Plow|business}} ("[[Mr. Plow]]")
**[[NASA]] Space Shuttle ("[[Deep Space Homer]]")
**Midnight Towboy ("[[Midnight Towboy]]")

== Goofs ==
*The track of [[Bus 23]] can be seen going into the river, but when Lisa falls there is also a track on the other side.
**However, this could be explained by the bus first crossing the ice bridge, and then falling into the river backwards.
**Also, from the way [[Superintendent Chalmers]] refers to the ice bridge, it's been used before. Previous vehicles (maybe even buses) crossing the bridge successfully would explain tracks on both sides of the river.
*When [[The Pooter Toot Express]] nears the river:
#It can be seen going down a short hill, which wasn't there when the blimp flew over the track.
#The track of Bus 23 is no longer visible, when it was clearly there before.
#It crashes into a tree that wasn't there before.

{{Season 22|R}}

[[Category:Cultural references]]
[[Category:Trivia]]
[[Category:Continuity]]
[[Category:Goofs]]