Well, start with the fact that it does happen, according to many people including the DoD remote viewers, and then explain it however you want. Hint: consciousness is primary, physicality is secondary. Near-death experiencers have proven you don't need a brain to perceive, though it sure is easier with one.I couldn't be more sincere, but your answer hasn't really got me any further towards understanding how one processes incoming stimuli like vision, sound etc. without the aid of sensory organs and a brain to organise it all. I don't mean to sound rude or disrespectful, but saying "it's a matter of exteriorizing the etheric body from the physical body" doesn't provide me with the detailed information I'm looking for.