"The top drawer of the second cabinet felt empty as she began to pull it open, but she never saw its interior. The floor dropped from under her. As she fell, she clutched wildly at the handle of the cabinet's drawer, but her grip had been too loose. It slipped through her fingers, and for an instant she fell into nothingness. Then she landed on a steep incline of smooth metal. Her feet hit first and instantly shot out from under her, and she fell...