Cartman: Hey, you guys! What if Ms. Crabtree doesn't come back and we're all trapped up here forever!
(The kids all gasp.)
Kyle: We couldn't get trapped up here forever, Cartman; we'd die after a couple of days…
(The kids all gasp louder.)
Cartman: (scared) I don't wanna die on this bus with you assholes! You guys suck!
Stan: Dude, would you just relax? We've been in a lot worse situations than this, and we've come out of them just fine.
Kyle: Worse than this??
Stan: Oh, sure. Don't you remember the time the alien visitors kidnapped your little brother Ike? Now THAT was scary!