[He bites down on his bottom lip. If getting through it means returning, then he'd just as soon not. He'd rather not go into his reasons for it though, so he says nothing, and lets the cave provide the distraction.]

Underground, or something made to look like it. [He turns around, looking up at the ceiling and trying to figure out exactly where the light is coming from.] Beyond that, your guess is as good as mine.

[Jack reaches over to touch him before pointing at one of the tunnels.]

A way out or certain death? Which one do you think it is?