There wasn't anyone else on the floor as far as she knew, or if they were, they were dead. But she was there, standing kind of in between some rubble with her hand down inside this hole. Where her hand was, it was set on a pressurizer that had been badly damaged in the blast. If she moved her hand the whole thing would go off. The whole hospital might even be destroyed.
When she heard the noise she looked up. She was so tired of standing but she couldn't do anything. And she was trying not to panic. "Hello?"