Pet Peeves

Here's my question.

What is your pet peeve, and why does it bug you so much?

I've been making a mental list of stuff that really bugs me, and i've actually came up with
quite a bit. To answer my own question, I think my top two most annoying pet peeves are:

1) Repetitive songs that have only 2-5 words to them and make absolutely no sense
and
2) When you want penut butter, and you try to get it out of the jar, but you can't because there isn't much left and what you can get always falls off the knife.

Anyone know what I'm talking about?
Maybe not. But those are probably my top two.
:)