He can tell by the echo that something’s about to change. Steve leads him out into the cavern proper. It is, well, cavernous . Big enough for a dozen of the huge trucks to pull around in a circle to be laden with rock and muck. Randy looks up, trying to find the ceiling, but all he sees is a pattern of bluish-white high-intensity lights, like the ones in gymnasiums, perhaps ten meters above. Beyond that it’s darkness and mist.