Perhaps? Do you have a link for confirmation?

 

Knock knock.

Who's there?

You know...

You know who?

Exactly! Avada Kedavra!


...Meh, I tried.

 

I'll admit, I laughed. Good Job.

 

*returns from a raid on Russian sites*
...Damn, nothing worth any attention there. But I came up with a stupid parody on a well-known song. HBP-related, too. Here it goes:

There was an old wizard who liked lemon drops...
He's dead, of course.

*shields himself from incoming kitchenware*