Buffy the Vampire Slayer, Season 2

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? [gets looks from the others and concedes] She's possessed.

Giles:
Possessed by what?

Willow:
Aaaaa possessing thing!

Giles:
[sarcastically] 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 all a little too old to be spelling things out.

Xander:
A bitcuh?