Starting to think the whole thing certain meditators go on about with the self - it's a "crutch", an "anchor" or whatever - is not too far wrong.
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Same general stack of body sensations. It's more like a break in immersion, like when you realize you're dreaming.
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There is a displacement of the sense of place, though: one moment "I" perceive things "from" some vantage, next there is just an undifferentiated field of sensations.