Buffy:  Well, we’ll be ready whenever it is.

Giles:  Which is tonight.

Buffy:  Tonight, okay… Not okay! It can’t be tonight!

Giles:  My calculations are precise.

Buffy:  Nuh! They’re bad calculations! Bad!

Willow:  Buffy has a really important date.

Buffy:  Owen!

Giles:  Alright, I-I’ll just jump in my time machine, go back to the twelfth century and ask the vampires to postpone their ancient prophecy for a few days while you take in dinner and a show.

Buffy:  Okay, at this point you’re abusing sarcasm.

Giles:  Buffy, this is no ordinary vampire. But we have to stop him before he reaches the Master.

Buffy:  But… Cute guy! Teenager! Post-pubescent fantasies!

Giles:  Those will just have to be put on hold! The dark forces are aligning against us, and we have a chance to beat them back. Tonight we go into battle!

[Cut to the graveyard. Giles and Buffy are sitting on a large gravestone.]

Giles:  Perhaps I miscalculated.

Buffy:  I’m thinking yes.

Buffy the Vampire Slayer, Season 1: Episode 5 – “Never Kill a Boy on the First Date”