Why do people think that if they knock on your door

 you're under some sort of obligation to answer?

Do you know how angry I am?


No,  you don't.


I don't even know how angry I am.

I was woken up this morning by the thump thump thump of one of my neighbours walking around.

How is it possible to make that much noise on floors with a base of poured concrete?

How can it not hurt their ankles and knees?


I live on the top floor.

What must it be like for the poor people who live underneath them?