Knock knock. Who's there? Tank.

Tank who? You're welcome! No, seriously, *tank* you for opening the door; I was starting to lose my *bearing* out here.

Knock knock. Who's there? A man with a

manuscript for a knock-knock joke, but he's struggling to come up with a decent punchline, and honestly, it's just getting a bit meta at this point.

Knock knock. Who's there? Byte.

Byte who? I'm having a little trouble processing your question.

Knock knock. Who's there? Repeat.

Repeat who? *sigh* Fine. Knock knock.