Knock knock. Who's there? Fig

Fig who? Fig-ure it out yourself!

Knock knock. Who's there? Alpaca.

Alpaca who? Alpaca the suitcase, you load the car!

Knock knock. Who's there? Sew

Sew who? Sew long, I've been trying to stitch together a decent joke.

Knock knock. Who's there? You tell me.

You tell me who? No, *you* tell *me* who's there. I'm the one knocking, how should I know who's inside?