[Wow, that was quite a thing to say to a guy who's just trying to be helpful. Jeez. Though it's hardly the first time someone has taken one look at him and immediately wondered why ALASTAIR had dragged this 'child' into their nonsense. So instead of an offended look, Miles is just getting fixed with one of those confused stares.]

I'm nineteen. [Said like he's discussing the weather, tipping his head back to continue staring down the tunnel just past his new and very vocally inappropriate friend.]

Have you already been down there or something? Stuff keeps getting blocked off, we should be really careful, right? But we still gotta' save them.