[Firo can feel his stomach twist at the idea of them being even remotely near the deep sea. He doesn't know much about it--except what Daylight's just told him and a few vague details from Szilard's memories--but the thought of all that water and stone above them is enough to make him feel claustrophobic.]

I wouldn't say "cool," exactly... Anyway, even if you managed to get one up to the surface, where would you keep it?