The latest illustrated anecdote from "Kartott":
I sometimes see these entities during meditation (eyes barely open, soft focus). They stand (float) about me, seeming to modulate a field of energy around me (I especially sense their hands, "combing" the energy). There always seems to be one primary entity, usually right in my face, others are more in the background. I don't get any verbal communication from them.
As the description above illustrates, the "Gray" archetype seems to possess the ability to manifest in a "visionary" manner. If so, who's responsible? We could be dealing with a hardwired neurological phenomenon, as argued by researchers like Michael Persinger and Albert Budden. Conversely, recurrent images of the Grays -- in varying stages of physicality and in a multitude of contexts -- beg the idea that they exist independently of the brain (at least temporarily).
The close encounter literature is rife with accounts in which "abductees," convinced their visitors are flesh-and-blood, encounter their assailants in apparent "out-of-body" and similarly altered states, suggesting that the Grays (and their kin) can maneuver in and out of our ontological framework at will. What might this say about the origin of our visitors (if indeed we're dealing with an externally imposed intelligence)?
Perhaps, instead of hailing from space, the "Grays" emanate from a much closer source. As Whitley Strieber suggests in "Communion," they could be an unacknowledged aspect of the human psyche and thus indistinguishable from mental aberration. As pioneering consciousness researcher Dr. Rick Strassman has shown, the aggressively psychedelic compound DMT can produce tellingly similar encounters, offering the novel idea that our brains can function as receivers or portals. (Ultimately, some of us might serve as nothing less than transportation devices for incorporeal intelligences, which might explain why some individuals seem predisposed to contact and the pageantry of strangeness that often accompanies it.)