Roller Derby is a brutal sport. Takes stamina, dedication and of course knowing how to skate helps. Casper's A'Salt Creek Roller Girls were in Laramie all weekend competing in the Wyo Cup against teams from all over the state and Colorado. The girls, made up of ladies of all ages makes and models, won two matches yesterday but lost to Cheyenne today. The girls skate against the Gillette Betties for second place. Roll on Girls.