Parents and young skaters stand outside the Twin Arenas waiting for the okay to go back in and resume games on Saturday. Just before four, during a Atom Thunder tournament game, the false alarm had parents grabbing their children and young hockey players. The alarm was caused by a faulty heat detector, according to Jeff Norburn, Director of City Services for the City. This is the same detector that caused the alarm during the Dec. 28 Kangaroos game. A new detector has been ordered.