Hard ta say. [He scratches his chin, thinking for a moment before continuing.]

Fer me it's more of a cowardice. My world back home is on the verge of the two pretty crappy apocalyptic options. One, the entire human race is sacrificed. Or two, all of the aer in the world is consumed and everyone, including the planet itself, dies. Of course there are kids tryin' to stop it, and I'm one of them, I guess I don't really wanna face it yet.

[He sighs.] That's not the only reason of course! It's just the most easily explained.