If you're following Azumanga Diaoh right now, then you'll know about Sakaki-sans run ins with a certain grey cat.
In episode 11, the cat takes it up a notch.
I put a <a href="http://coolantx.hn.org/media/azumanga.avi">clip</a> up on my server for you guys to see. It's really funny
Even if you're not watching the series, shame on you!
The clip contains no spoilers... so download away.