Willow:  She’s possessed!

Giles:  Possessed?

Willow:  That’s the only explanation that makes any sense. I mean, you should’ve seen her last night. That wasn’t Buffy.

Xander:  Are we overlooking the idea that she may be very attracted to me? … She’s possessed.

Giles:  Possessed by what?

Willow:  Aaaaa possessing thing!

Giles:  Well, that narrows it down.

Xander:  Well, you’re the expert. Hey, maybe when the Master killed her some… mystical bad guy transference thing happened.

Willow:  That’s what it was! I mean, why else would she be acting like such a b-i-t-c-h?

Giles:  Willow, I think we’re a little too old to be spelling things out.

Xander:  A bitca?

Buffy the Vampire Slayer, Season 2: Episode 1 – “When She Was Bad”