The stream of consciousness, otherwise the product of the default mode, is as if a sensitive medium is responding to a bombardment of random excitations. This thing gives them a rough sense as they rush by, and it is that loose sense-making that is automatic and yet a subtle strain. It's the same process that makes dreams, but tighter and damped and hence more staccato. The intensity of it can go up and down, louder and softer, and in the same way as you are unable to moderate your immersion in it, you cannot affect this aspect of it either. From 'inside' what is most salient is the randomness, but from 'outside' it would seem, like dreams, to be entirely in the style, in the timbre and odour of your self.