Dr. Skeledon answers the phone at the end of this episode.
Carlos: Let's get out of here before we're DEF!
Carlos: (running away) Digested... Eliminated... and Forgotten!!
(The class is looking for Arnold and Phoebe across from a river of Parasaurolophus dinosaurs)
Carlos: I bet they're ordering an Arnold burger!
Keesha: With Phoebe fries to go!
Phoebe: C'mon, Arnold, let him go. It's just an egg.
Arnold: But it's Dr. Skeledon's egg. And it's up to me to get it back to her!
Phoebe: Gee, what a guy!
Miss Frizzle: Just like old times, eh Carmina?
Dr Skeledon: Like that time we went to Scotland to find the Loch Ness Monster.
Arnold: That must have been in prehistoric times.
Ms. Frizzle: She's just giving them some ABC fruit salad.
Kids: Already been chewed!!!
Arnold: ...only I'm too big to fit in the bus.
Ralphie: With a few adjustments, you could be the bus!
Carlos: It must have been a sneeker-saurus! Get it? Seeker--saurus?
This is one of the few episodes where Arnold doesn't say "I knew I should have stayed home today". Instead, Phoebe says, "It's a good thing you didn't stay home today, Arnold".
Although it's name was never mentioned, the dinosaur at the nesting ground was a Maiasaura.
Title: The Busasaurus
This is similar to the name of the dinosaur the brontosaurus.