Hello darkness, my old friend

A fishy question

Two fish in a goldfish bowl have an argument until one of them gets mad and sulks at one end of the bowl for a while. Then he swims back to the other fish with a huge grin on his face and asks, "Oh good, if there's no god, then who changes the water?"

Knock knock!

Guy comes into my office this morning and goes, "Knock knock!" So of course I answer with, "Who's there?" But he in return just goes, "Company shredding." I'm not even sure, if "Shredding" is the name of the company that shreds the sensible data we store in boxes or whether he meant to say that he is from the company that comes to collect the sensible data from our box for shredding. He seemed happy and in a good mood, but he wasn't exactly on the ball.

I wrote that to a couple of friends. Two of them wrote back asking what I had expected. Well, something clever or funny. The other day for example I read something in English that I found quite funny and unusual:

Knock knock
Who's there?
Little old lady.
Little old lady who?
I didn't know you could yodel.

I wasn't on the ball myself though. I should have told him that he should think of something to reply for the already hinted Knock knock joke.

Do you know any good Knock knock jokes? Write them in the comments!

A joke

Rorschach in "Watchmen":

I heard joke once: Man goes to doctor. Says he's depressed. Life seems harsh, and cruel. Says he feels all alone in threatening world. Doctor says: "Treatment is simple. The great clown Pagliacci is in town. Go see him. That should pick you up." Man bursts into tears. "But doctor...", he says, "I am Pagliacci." Good joke. Everybody laugh. Roll on snare drum. Curtains.