Giles:  I wonder if they’re here for any purpose, particularly.

Buffy:  You’re the Watcher. I just work here.

Giles:  Yes, I-I must consult my books.

Xander:  Oh, eight minutes and thirty-three seconds, pay up. (Willow hands him a dollar) I called ten minutes before you’d consult your books about something.

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