Tommy M:
Nirodha Samapatti (as described in MCTB[1]), in my experience, is a complete shutdown of the entire mind/body interface. There is no disconnectedness 'cause there's nothing to be connected to or disconnected from, there is no stillness 'cause there's nothing to be still or unstill, it's the complete cessation of perception and feeling which may cause one to realize that there is no"thing" beyond this immediate sensate experience.
Thanks, Tommy. I accept that it's probably not NS, if only on the grounds of my skill level, but just to clarify, "complete shutdown" sounds like the right description, better than "disconnection." To be more precise, there was still a visual field, but there was nothing there, not even the usual crap you see when you close your eyes. There was no awareness of physical sensations whatsoever. You might say that there was awareness of awareness, but that's about it.
Tommy M:
Take care and I hope you stay strong through what's going on right now.
Thanks. It's been a few months. I am adjusting to the loss.