"Maybe they taste bad," he says, glancing up again. Considering the fact that he has handled them many times in his life with no ill effects, he's not worried about what they can do. "Or maybe they think they're pretty, too." It's tongue in cheek, something to try to get him out of worry mode if he can.

"Trust me. Of all the things we could find down here, the glow worms are the least dangerous." OK, that sounded more reassuring in his head than when it came out. His smile is a little sheepish.