Knock knock. Who's there? Donut.

Donut who? Donut even think about leaving me out here!

Knock knock. Who's there? Tell me.

Tell me who? No, *you're* supposed to tell *me* who's there. I'm the one who knocked, and now I'm waiting.

Knock knock. Who's there? Silence.

Knock knock. Who's there? Cereal

Cereal who? Cereal-ly good at making bad jokes, it's a grain of truth!