This was hillarious. I had some kind of culture shock. It's ridiculously American! Roller Derby is the name of the event tonight. Girls, well, people a little older than girls, wearing punk clothes and roller skates, ran round on the track, hitting and pushing each other. Well, I'm not a person who loves violent sports such as boxing at all, so I didn't like the hitting and pushing part of Roller Derby. But it's still fun to see and experience an "American" thing.