In this year's Christmas episode (and the last episode of the year 2000), the kids are snowed in thanks to a freak blizzard and Principal Skinner must call upon his skills as a drill sergeant to keep the kids in line (which doesn't work, as Bart and the others lead a revolution).
- Ascended to Carnivorism: Apparently Vietnamese elephants eat people.
- Angry Fist-Shake: Homer does this when he refuses to leave the circus during a storm, demanding that they nourish the child within him.Homer: NOURISH!
- As Long as It Sounds Foreign: Bart shouts "di di mau" at Skinner because he's a Vietnam veteran, which is a grammatically incorrect way of saying "go faster". It's actually a Shout-Out to The Deer Hunter.
- Bait and Switch: Principal Skinner told the students they'd watch a story about a grinchy creature that almost stole Christmas. Then he showed "The Christmas that Almost Wasn't but Then Was."
- Earlier in the episode, the radio announced that all school were closed, including Springfield Elementary (Bart: GASP!) My Dear Watson Detective School. Then it mentions Springfield Elementary School, and after Bart and Lisa cheered, it added, "...is open."
- Chief Wiggum appears to be writing his name in the snow, then asks Lou to shake out the last few drops. It turns out Wiggum was using coffee he was pouring from a Thermos.
- Marge seeing the flexible female acrobats gives her ideas, making us think she's referring to sexual positions...but then when her thinking of using contortion skills to clean.
- Brief Accent Imitation: Lisa and Homer briefly speak in a French accent at the beginning:Marge: Ready for the circus, Homer?
Lisa: Le Cirque de Pureé. We've had tickets since Septembre.
Homer: But I want to watch Brett Favre.
- Call Back: When Ned tries to remind Homer of his Mr. Plow business, Homer responds, "I think I know my own life, Ned." This is a call back to a similar remark he made in "Mom and Pop Art", when he screws up a Continuity Nod to "Brush with Greatness".
- Continuity Nod: Upon reading his permanent record, Bart read "Underachiever and proud of it?" and asked how old that thing was.
- Also, Flanders asks Homer whatever happened to his Mr. Plow business (for those who don't know, an unseasonably warm winter and Komatsu Motors repossessing the plow Homer never made payments on is why Homer doesn't have his Mr. Plow business anymore), and points out that he still has the jacket (which Homer kept around because Marge likes it when Homer wears it in bed).
- Contortionist: Marge watches some of these perform at Le Cirque de Pureé.Marge: Oh, look at those exotic positions! Watching those women is giving me ideas... (imagines herself contorting her body as she cleans the bathroom)
- End of Episode Silliness: On the way home from rescuing the kids, the car fumes get to Homer again and he hallucinates Lisa as a camel and Bart as a harem girl.
- Epic Fail: When Homer attempted to make a snow angel, he ended up making a snow devil instead (which, according to Homer, always happens).
- At one point during the movie the kids were watching, the film broke in half and the projector caught fire. Nelson then mocked Skinner, saying he should've gotten a DVD, to which Skinner replied it was a DVD.
- Fridge Logic: Invoked when the students rummage through the file cabinets while Skinner is tied up.Nina: Hey, look how much Skinner makes. $25,000 a year!
Bart: Let's see. He's forty years old, times 25 grand. Whoa! He's a millionaire!
Skinner: I wasn't a principal when I was one!
Nelson: Plus, in the summer, he paints houses!
Milhouse: He's a billionaire!
- Getting Crap Past the Radar:
- When Groundskeeper Willie has enough of Skinner, he says "You can't slap your Willie around anymore!"
- Skinner asks the hamster to "chew open my ball sack", meaning the sack for the dodgeball balls in which he is trapped.
- The aforementioned scene of Chief Wiggum writting in the snow.
- Gym Class Rope Climb: As revenge for Skinner being a hard-ass, Bart and the other classmates force Skinner to climb a rope. Skinner protests that it's physically impossible.
- Halfway Plot Switch: The episode starts out with the Simpsons attending a French-Canadian circus, but then a snowstorm rolls in and blows the circus away.
- Hand Wave: Flanders explains his car's lack of airbags by saying "The church opposes them for some reason."
- Hydrant Geyser: Homer crashes a fire hydrant on Ned's car, trapping both of them when the water freezes over.
- I'm Standing Right Here: While Homer and Flanders were trying to drive to school to rescue the kids, Flanders once believed they ran over something. Homer said he hoped it was Flanders.
- Lead In: Homer watching a football show on television.
- Mushroom Samba: The fumes getting inside the car cause Homer to hallucinate that he's a sultan with a harem and a hose full of salad dressing.
- Mustache Vandalism: When the kids take over the school, Milhouse decides to draw mustaches on paintings of former Presidents. He does it to portraits of Warren Harding and Woodrow Wilson but doesn't know what to do with William Howard Taft, who already has a mustache.
- Not Distracted by the Sexy: During one of Homer's hallucinations, he is entertained by some belly dancers, but shoos them away:Homer: Enough. I grow weary of your sexually suggestive dancing.
- Oh Crap!/Rule of Three: The kids shouted the first time when a snow storm got them stuck inside school, the second when they realized it'd make them miss Christmas, and the last and loudest when Principal Skinner announced his lame Christmas movie could be watched again.
- Padding: Invoked: "The Christmas That Almost Wasn't, But Then Was" features a song that is apparently two hours long.
- Screw This, I'm Outta Here!: Not wanting anything to do with a school being open during a snow day, the teachers instead attended an "emergency caucus" (which turns out to be a day at a ski resort).
- The hamster after Principal Skinner orders him to chew through his (dodge) ball sack.
- Self-Serving Memory: Parodied.Ned: Hey, whatever happened to the plow from your old snowplow business?
Homer: I never had a snowplow business.
Ned: Sure you did — Mr. Plow. You're wearing the jacket right now.
Homer: I think I know my own life, Ned. (proceeds to sing the Mr. Plow jingle)
- Shout-Out: The title of the episode is a parody of Smilla's Sense of Snow.
- Spoiler Title: The Christmas That Almost Wasn't But Then Was.
- A Storm Is Coming: When the weather starts acting up, Sideshow Mel exclaims these words, adding, "I can feel it in my bone."
- They Just Didn't Care: Invoked in "The Christmas That Almost Wasn't, But Then Was", where a stage hand is seen in the background of one scene.
- Writing Lines: Bart forces Skinner to write, "I ain't not a dorkus" (which Skinner calls "a grammatical nightmare").