Desc: Knocking Girls Down: Directed by Michael Letcher. With Schnot Nose Kid, Acute Pain, Ann Rollin, Temper Tantrum. They talk about mutual support, self determination and the satisfaction of a good smack well-delivered. Roller Derby has been reborn as a women's amateur sport in 200 cities. The participants are well educated middle class professionals for whom the activity is an outlet for physical expression and a source of refuge and community. And so it is for this Birmingham team known as The Tragic City Rollers.