[Buffy and her friends converse loudly in the movie theater.]

I can't believe these people. We paid money to see this.

No, we didn't.

Oh, yeah. But I still wanna know what happens!

Everyone gets horribly killed except the blonde girl in the nightie, who finally kills the monster with a machete. But it's not really dead.

Oh, my God, is that true?

Probably. What movie is this?
...

[Later: Buffy and her friends bump into the same two guys at a cafe.]

Hey, wait a minute...

You're the guys from the movie!

We hate you guys.