Shannon moved a little too quickly, whirling her head around and she regretted it instantly as her stomach churned. But, she'd heard a voice. A female one. Didn't sound like Kate, though, or Claire...definitely didn't sound like Sun. "Hello?" she called back in a raspy voice. There was a little more volume there, now, but not much. "Where are you?" A pause. "Who are you?" she called out suspiciously.