Grunkle Stan tells the employees of the Mystery Shack that they should clean the bathroom while he's out. (Soos: "Yes, sir!" Wendy: "Absolutely not")! Wendy decides to show Dipper and Mabel the ladder that goes to the top of the roof. The two hold a pine-cone throwing contest. Wendy gets a bullseye, and Dipper hits a car, causing her to hi-five a smitten Dipper. However, Wendy's friends come over, so she decides to leave Dipper and Mabel by jumping on trees down to the van. Mabel suspects Dipper of having a crush on her. Dipper is defensive, stating that he does not lie awake thinking about her.
Wendy and Mabel have a dance party "for no reason". Dipper is asked to dance, and Mabel reminds him about an old dance he used to do, the "Lamby Lamby Dance". Dipper asks Wendy if they can tag along with her on her hangout with her friends. To do this, he lies about his age (stating that he is 13). Her friends come over, and Dipper meets this eccentric cast of teens. Forced to sit in the back with Mabel, they take off in the busted down, written on minivan, for an abandoned convenience store ("Thompson! Thompson! Thompson!")
Meanwhile, Stan cannot find the remote, and refuses to get up. He has to watch "The Duchess Approves", a film about the life of royalty. He does not take this well at first, but becomes hooked into the movie.
After arriving at said convenience store (Dusk 2 Dawn), Dipper decides to slip over the fence, to prove that he is not afraid to Wendy. Dipper then decides to slip in the locked convenience store that one of the teens could not unlock, and is rewarded with praise from the teens. Said teens wind up going insane, eating expired food, putting mints in soda to see it explode, and having fights with bags of sugar. Mabel decides to eat some "Smile Dip", which was banned in America. Mabel consumes the entire sugar packet, and undergoes strange hallucinations, including dogs and riding a four headed dolphin with hands in its mouths. ("ONWARD AOSHIMA!") Dipper is told to go get ice for two of the teens... and winds up seeing a recreation of the nervous system. In monster form. He distracts the teens with "Dancey Pants Revolution" ("the game that tricks you into exercising!"). Dipper then winds up finding the outlines of two bodies on the floor. One of the teens wants to lie down in them, and Dipper, already knowing that something's not right in the store, asks everyone to reconsider "what if this store is really haunted". He is laughed off and earns the title of "Captain Buzzkill" from all of the teens, including Wendy. Enraged at accusation of cowardice, Dipper lies down himself.... only for the outlines to disappear.
Soon, the store goes insane. Tambry is trapped in the security camera (with her screams being recorded in her cell phone), another is put on a cereal box IN THE CEREAL, and another is forced INTO "Dancey Pants Revolution", and tries to dodge the arrows. Then a ghost possesses Mabel, who tells them to leave if they apologize. Dipper apologizes, and the ghost tells them that hot dogs are 50% off. However, it was a trick, and a teen is turned into a hot dog. The store is turned upside down, and Wendy and Dipper have to hide out in a squishee machine. However, Dipper realizes that this was because the ghost may be irritated by "what teens do", and decides to out himself as 12 years old.
Then, Mabel is released.... and the ghosts were just two senior citizens who, in the 1990s, were irritated by teens, and had fatal heart attacks because of "rap music" ("Homework's whack and so are rules, tucking in your shirt's for fools!") Dipper has to dance his way out.... with the "Lamby Lamby Dance" that he was forced to perform during his younger years. The teens are freed, Mabel gets off her sugar trip, and Wendy thanks Dipper, and tells him that they should hang out more often. She is the only one who witnessed his humiliating dance, and tells her friends he attacked the ghosts and fought them off instead, which thoroughly impresses them.
Tropes in this episode:
- Acid-Trip Dimension: Mabels hallucinations are these.
- Affably Evil: The convenience store ghosts. They're such a sweet, old couple that for you could easily forget that they're also vengeful and sadistic spirits who inflict horrible punishments on the teenagers who broke into their haunting grounds.
- Air-Vent Passageway: How Dipper breaks into the store.
- Balloon Belly: Mabel has one after eating too much Smile Dip.
- Big "NO!":
- Grunkle Stan's initial reaction to being stuck watching The Duchess Approves.
- Pa's response when Dipper asks him if he may do something else than dance to save his friends, a la Voice of the Legion.
- Pa's reaction to rap music in the flashback.
- Brick Joke:
- During the first car ride, Mabel scratches out the words "You Stink!" and writes "You look nice today!" beneath them, claiming that it will blow someone's mind. At the end of the episode, she looks at it again, all sick from the Smile Dip, and mutters, "What kind of sick joke is this?"
- Mabel offhandedly mentions the "Lamby Lamby Dance" and shows a photo of Dipper in a lamb costume. Dipper actually has to do the dance, complete with lamb costume, to free his friends.
- Chekhov's Skill: The Lamby Lamby Dance.
- Chunky Updraft: With convenience store items, after Mabel is possessed.
- Cool Big Sis: Wendy acts as this to Mabel and Dipper.
- Cut a Slice, Take the Rest: How Mabel eats Smile Dip for the first time.
- Cuteness Proximity: Wendy gets a huge grin on her face when she sees Dipper doing the Lamby Lamby Dance.
- Demonic Possession: Mabel gets possessed by the ghosts of the convenience store owners, causing her to to get Powers via Possession.
- Disney Acid Sequence: When Mabel uses the Smile Dip, she gets hallucinations.
- Eleventy Zillion: Mabel manages to eat "bleventeen" packs of Smile Dip in a single sitting.
- Embarrassing Old Photo: Baby Dipper in a lamb costume.
- Exorcist Head: Mabel possessed makes one.
- Fingertip Drug Analysis: Parodied when Mabel takes a big lick of the substance coating the take-a-penny tray. "Yep! It's dust."
- Getting Crap Past the Radar: Dipper, laying in his bed at night after his rooftop scene with Wendy, gets an uncomfortable look on his face, and says "Uh-oh." Admittance of a crush that he was in denial about, or a Raging Stiffie? This is made even more racy as the next episode shows that he is going through puberty.
- Gilligan Cut: When Mabel claims Dipper has a crush on Wendy, he denies it, since it's not like he's "awake all night thinking about her". Cut to Dipper doing exactly that.Dipper: Uh oh.
- G-Rated Drug: Mabel is clearly high on Smile Dip.
- Hallucinations: Eating too much Smile Dip causes Mabel to have these.
- Haunted House: Or in this case a haunted convenience store.
- I Can't Believe It's Not Heroin!: The Smile Dip candy, which is illegal to sell in the United States. It makes Mabel have a Disney Acid Sequence with brightly flashing colors and candy creatures.
- Laugh of Love: Dipper chuckles nervously while bidding Wendy goodbye as she leaves with her friends, which results in the following exchange:
- Mabel: Uh-oh!
Dipper: (defensively) What?
Mabel: (pokes Dipper in his cheek) Somebody's in lo-ove!
- Lost in Translation: Dipper claims to be thirteen and thus "technically a teen" but later admits to really being twelve and thus "technically not a teen". This doesn't work in the dubs of some languages because words for numbers don't follow the same pattern as in English. For example, in the Polish dub, after they find the outline, Dipper claims to be 13. When he says the truth, he claims to be ten because the equivalent of teen prefix starts in Polish at eleven.
- Lost The TV Remote: Stan can't find the TV remote and "refuses to stand up". Later, after watching several hours of a soap opera and, to his surprise, absolutely loving it, his excuse for throwing the TV out the window when Dipper and Mabel return is that he couldn't find the remote.
- Mushroom Samba: Mabel while overdosing on Smile Dip.
- No, You:Videogame: You're a dance machine!
Thompson: No! You're a dance machine!
- Overly Long Name: The cast of The Duchess Approves includes "Sturley Stempleburgiss as the Duchess, and Grampton St. Rumpterfrabble as irascible coxswain Saunterblugget Hampterfuppinshire."
- Powers via Possession: Mabel gets this when being possessed by the ghosts.
- Ragnarök Proofing: The old convenience store — abandoned since 1995 — still has electricity, all the food is unspoiled, and the ice in the freezers is still frozen, despite the power being turned off until Wendy turns it back on. Justified since it is haunted and possibly frozen in time.
- Reality Warper: Inside of the old abandoned convenience store, the ghosts of the store owners can trap trespassers in any of the objects within the store. This includes the security camera television, the dance machine, a cereal box, and the hot dog cooker (which physically transforms the victim into a hot dog). They also conjure up a lamb costume out of nowhere for Dipper.
- Shout-Out: Mabel doing The Three Stooges -style whooping while spinning on the ground.
- Teens Are Monsters: The store owners think so.
- What Happened to the Mouse?: Robbie was never seen attacked nor transformed by the ghosts and it's unknown if he witnessed Dipper's Lamby Lamby Dance.
- Wink "Ding!": Punctuates Dipper's performance of the Lamby Lamby Dance.
- Worst News Judgement Ever: A paper from 1995 decided "Cheese crust pizza declared delicious" is more important than "War or something..."
- Wouldn't Hurt a Child: The convenience store ghosts would hurt teenagers, but you're fine if you're under thirteen.
- You Gotta Have Blue Hair: Tambry has purple and pink colored hair.