Over lunch with several colleagues, we talked about a phenomenon noted by Andreas Mavromatis in his book Hypnagogia, the twilight state between waking and sleeping. (We’ve all been there but usually very briefly.) Most of the time a distinct intermediate zone does not register in our awareness, and we are, as they say, out like a light. But often enough, while still holding to a dim waking awareness, images of a phantasmal nature appear in the field of consciousness. Still anchored in our waking state, we can observe our own hallucinations.