LOUISVILLE, Ky. (June 23) - Six Flags and Cedar Fair shut down eight more thrill rides around North America on Friday after a teenage girl's feet were sliced off during a ride in Kentucky. State inspectors were at the Six Flags Kentucky Kingdom to examine the Superman Tower of Power, where the accident happened Thursday. The ride lifts passengers 177 feet straight up, then drops them nearly the same distance at speeds reaching 54 mph. A cable broke loose on the ride, striking the 13-year-old girl in the legs, said Bill Clary, a spokesman for the Kentucky Department of Agriculture, which inspects amusement park rides. Clary said inspectors don't know what caused the cable to break. Six Flags shut down similar rides at parks in St. Louis; Gurnee, Ill.; and near Washington as a safety precaution, Goldberg said. She said Six Flags Over Texas, near Dallas, also has a Superman Tower of Power, but it is not the same ride. There had been no reports of injuries on the ride before Thursday, she said. "Millions of people have safely ridden this ride in our parks," Goldberg said. The ride passed inspection in each of the last four years according to inspection records, The Louisville Courier-Journal reported on its Web site. Cedar Fair Entertainment Co. also shut down drop tower rides at five of its amusement parks for inspection, company spokeswoman Stacy Frole said. Frole described it as a precautionary measure.