(Scene shows children standing in rows, playing accordions. At the end of the sequence, crows fly overhead. A girl, hearing a noise, gasps. The children scream as a landslide occurs on the nearby mountain, revealing a cave. Suddenly, a dinosaur appears out of the cave.)
(Intro sequence plays)
(Scene cuts to the road. Fred Jones drives the Mystery Machine with Shaggy and Scooby playing the accordion in the backseat.)
Daphne Blake: You guys think you could, maybe, wait to practice until we actually get to the accordion camp?
Shaggy Rogers: Like, no doin's, Daph! Scoob and I gotta hone our skills!
(Shaggy and Scooby continue playing.)
Daphne: Fred, please drive faster.
Fred Jones: I'm trying. (sighs) We're almost there.
Velma: Wow, thank goodness-
Fred Jones: Whoa!
(Fred notices many vehicles driving quickly in their direction.)
Fred: Hang on, gang!
(Fred swerves the Mystery Machine out of the way of the vehicles. A truck appears and they are forced to swerve off the road. They crash.)
Daphne: Why is everyone in such a panic?
Fred: Let's find out.
"Weird Al" Yankovic: You can't leave! Don't take my students away, please! (cries) There's so much accordion music left to play! (gets on knees) Noooo!
(Mystery Inc. appears.)
Yankovic: Hang on, I'll be right with you. Nooooo! (changes tone) Hi, there! Welcome to Weird Al's All-Accordion Marching Band Camp!
Mystery Inc.: (in unison) Wow! Famous singer-songwriter "Weird Al" Yankovic!
Shaggy: (laughs) Scoob and I have been dreaming about coming here for years!
Scooby: Yeah, years!
Daphne: Mr. Yankovic, why is everyone leaving?
Yankovic: Please, call me Weird Al. It seems there's a crazy rumour going around that a real-life dinosaur is attacking my accordion camp. All their parents are pulling their kids out!
(A car pulls up and honks at Yankovic. There is a girl in the backseat.)
Yankovic: Michelle, not you, too! You can't leave!
Shaggy: (taps Yankovic's shoulder) Um, Weird Al? You know that dinosaur rumour? (points) I'm not so sure it's a rumour!
(A dinosaur emerges from the forest.)
Yankovic: You have to leave! You have to leave right now!
(The car drives away. Mystery Inc. and Yankovic run away as the dinosaur chases Shaggy and Scooby.)
Yankovic: Oh, cool. Chase music. (pulls out accordion, sings) And just when I thought I'd seen it all with these eyes, I'm watchin' the boys (inaudible) runnin' for their lives! Run, run, run! Run, run, run, from a dinosaur!
(Shaggy and Scooby run from the dinosaur.)
Shaggy: Like, run!
(The dinosaur bites onto the accordion attached to Scooby's feet.)
Scooby: R'uh, oh.