Buffy: So, what did you and Principal Snyder talk about, anyway?
Joyce: Principal Snyder said you were a troublemaker.
[Buffy looks down, ashamed]
Joyce: And I could care less. [Buffy looks back up] I have a daughter who can take care of herself, who’s brave and resourceful and thinks of others in a crisis. No matter who you hang out with or what dumb teenage stuff you think you need to do, I’m gonna sleep better knowing all that.
Buffy: About how long till this wears off and you start ragging on me again?
Joyce: Oh, at least a week and a half.
Buffy: Very cool!
[BtVS, Season 2: School Hard]