If I had to make something up, I'd say that the "spirit" has no detectable physical or empirically visible form (are you liking this so far?) but is only manipulating the viewer's quantumvibrationalenergetic lobe, resulting in a Spirit Induced Hallicination (SIH) which is indistinguishable from a normal hallucination, dream, or drug trip.
How's that? Sounds pretty water tight to me. Where my mirrion dorrar?
Does that help?

