Slimer is playing with a paddleball, but gets snagged on a biker. Eventually, however, the cord breaks, then the Junior Ghostbusters walk up. He wants to play, but they have to go to school, and when he asks if he can join them, they decline due to the school specifically forbidding ghosts. They get on the bus, but one of them, Donald, drops an envelope.
Slimer tries to return the envelope, but doesn't catch up until he reaches the school. He tries to enter, but Mrs. Stone, who is working there, holds up a stop sign. She asks him his name, then doesn't let him in due to him not being on the student list. He explains about Donald's envelope, but she still won't let him in and yells at him to go away.
He carries the letter within his body and sneaks in through the walls, but when the school bell where he's hiding rings, Mrs. Stone looks up and catches him. She tries to take him to the principal's office, but he escapes and enters the lab.
Mrs. Stone enters, so Slimer hides in the frog tank. She searches the room, but doesn't catch him because he shapeshifts into a frog. However, when she leaves, he makes a noise, so she comes back. He hides in the skeleton model, and accidentally says, "No" when she asks if she heard something. Luckily, Mrs. Stone is scared off by hearing words coming out of the skeleton, so Slimer escapes out the window.
He looks for Donald on the playing field, but Mrs. Stone sees him, so he hides in the tennis ball launcher. He then accidentally turns it on, then she starts hitting the balls back. Then, he gets launched out and accidentally lands on her face.
The Junior Ghostbusters' drama teacher is about to disqualify them from the talent show due to them lacking the envelope, but Slimer returns it. Then, Mrs. Stone barges in and grabs him. She pulls, but he clings onto the curtain rope, and the curtains are opened, so the audience sees and laughs. Then, the curtain falls and covers Slimer and Mrs. Stone. After a scuffle, Mrs. Stone breaks through the curtains and looks for Slimer, but he's in her pocket and makes faces. The audience claps and cheers, so Mrs. Stone decides he isn't so bad after all and gives one of her rare smiles.
This short provides examples of
- Accidental Misnaming: Slimer thinks Mrs. Stone is named Mrs. Stoneface, which offends her.
- Alliterative Title: Class Clown.
- All Part of the Show: Implied — the audience claps and cheers when Slimer makes faces, indicating that they think it's one of the acts in the talent show.
- Companion Cube: Slimer greets, and later shushes, the skeleton model in the lab.
- Foreshadowing: At the beginning, the Junior Ghostbusters note that Mrs. Stone hardly ever smiles. She ends up smiling towards the end of the short.
- Forgot About His Powers:
- Slimer seemingly forgets about both his intangibility and his flight when he accidentally ties himself around a lamppost, doesn't get free until the string unties, and then falls down.
- He forgets his intangibility again when he can't phase through Stone's hands when she grabs him.
- Get Out!: Mrs. Stone yells at Slimer to leave when she finds he's not on her list.
- Inevitably Broken Rule: The school forbids ghosts, but Slimer must go there anyway despite being a ghost to return Donald's envelope.
- Nearly Normal Animal: The frogs are mostly non-anthropomorphic, but they wave Slimer goodbye.
- Not on the List: Mrs. Stone doesn't let Slimer into the school, since she has a list of students who he's not on.
- Reactive Continuous Scream: When Slimer talks while hiding in the skeleton model, Mrs. Stone screams, so he screams
- Rhetorical Question Blunder: Slimer gives himself away by replying, "No" when Mrs. Stone asks if she heard something.
- Slapstick:
- Slimer accidentally ties himself around a lamppost and falls down.
- Slimer and Mrs. Stone end up falling over and having the curtain fall on them.
- Speak in Unison: When Mrs. Stone tells the Junior Ghostbusters to "move it" or they'll be late, they say, "Yes, Mrs. Stone" at once in a resigned voice.
- Technicolor Science: The school's lab features a beaker of orange stuff and a beaker of green stuff.
- When She Smiles: The Junior Ghostbusters are happy at the end that Mrs. Stone is smiling for once.
- Wild Take: Slimer and Mrs. Stone's eyes bulge out when they scream.
