Evil cat

since I had an evil sheep, I had to try an evil cat!
An ugly copy of [link] this picture, wich I randomly found on the net. A friend of mine told me it's from a manga/anime called Azumanga Daioh, but this was simple enough to try to copy... and here it is.
I was a bit in a rush and it was very late when I started drawing this, so there are lots of errors (as usual).