Knock, knock.
Who's there?
Your dad.
But my dad's dead.
I know, just reminding you!
Dark Knock-Knock
Explanation
Explain Bear
Okay, so listen up, buttercup. This dude does a knock-knock joke but then hits you with the fact that your dad is six feet under. It's funny 'cause it's messed up. You probably don't get it 'cause you still think the world is sunshine and rainbows. Get real!