Giles: We’re at the center of a mystical convergence here. We may, in fact, stand between the Earth and its total destruction.
Buffy: Well, I gotta look on the bright side. Maybe I can still get kicked out of school!
Xander: Oh, yeah, that’s a plan. ‘Cause lots of schools aren’t on Hellmouths.
Willow: Maybe you could blow something up. They’re really strict about that.
Buffy: I was thinking of a more subtle approach, y’know, like excessive not studying.
Giles: The Earth is doomed!
Buffy the Vampire Slayer, Season 1: Episode 2 – “The Harvest”