Just then the night supervisor came by. She told everyone to leave immediately. The students were packing their hair care equipment into their bags. The night supervisor waited impatiently. Finally, after almost five minutes, all the students and their teacher left the building. They apologized for being so slow. The firemen never arrived. Instead, a school police officer showed up. He walked around the area with the supervisor. It was a false alarm. The officer used his key to finally turn off the alarm But it was too late for Jennifer. She had listened to the loud alarm for too long. She should have known better. Even as she drove home, her ears felt strange