Buffy: So, this isn’t a vampire problem?
Giles: No.
Buffy: But this is funky, right? Not of the norm.
Giles: Quite. Spontaneous human combustion is rare and scientifically unexplainable. There have been cases for hundreds of years. Usually all that’s left is a pile of ashes.
Willow: That’s all that would’ve been left if it hadn’t been for Buffy.
Xander: So, we have no idea what caused this? That’s a comfort.
Giles: But that’s the thrill of living on the Hellmouth. There’s a veritable cornucopia of fiends and devils and ghouls to look at.
[They all look at him confused]
Giles: Pardon me for finding the glass half full.