As in the case of the spectrum of light, there is a continuum of consciousness and Greg's linguistic form is a modulation, rather than a construction. As usual KS confuses the subject with the self with the ego. The ego which thinks is not necessary the same as the being who acts. It can even be empirically identified as correlating to certain brain activity. One need not lean on century old psychoanalysis for the notion of the unconscious.
Dreams derive from the unconscious.
Anyway, the curious thing about this phenomenon is that I remember having a very heightened visual awareness and at the same time being unconscious about what my body was doing. I tried many times after that to recreate the same move, but without any luck. I agree with Jonathan. I'm sure this kind of experience is relatively common in any sort of physical emergency. I'd be interested to know what Jonathan's phenomenological differences were too, as I haven't noticed any in these states.