Some people just live to make others miserable. Everyone likes to feel built up, but sadly there are way too many people who accomplish this by tearing other people down. These people are called "bullies," and the feeling of temporary superiority is enough to fill that empty space in their hearts for a while. Then, they need to do it all over again. I've never had sympathy for someone who acts like this, and I was glad to see the guy extract a little justice in the end.