It's time for the last bout of the season for banked-track roller derby league Tilted Thunder Rail Birds—the championships. If you haven't seen banked track roller derby, it's very exciting. The tilted track adds a higher level of strategy and different ways to knock people out. It's happening this Saturday, August 18, at 5 pm. Athletic women, hot outfits, fast action, bodily harm, beer and snacks: Highly recommended.