Knock knock. Who's there? Isabelle.

Isabelle who? Isabelle not working, that's why I'm knocking!

Knock knock. Who's there? Wait.

Wait who? Wait a second, I thought *you* were supposed to tell *me* who's there!

Knock knock. Who's there? Silence.

Knock knock. Who's there? Next.

Next who? Next time, just open the door, this isn't a surprise party.