my sister had a near-death experience that felt very much like my numinous experiences and i dont think thats a coincidence. she described it as falling asleep within the sunshine with no pain (she has chronic pain), which also reminds me of sushupti aka dreamless sleep because she said it was like dreamless not dreaming sleep and that she had no consciousness of her body and that she was happy. (people are usually totally unconscious in dreamless sleep but in hinduism the jiva is believed to experience bliss in dreamless sleep, but is ignorant of this bliss upon waking.)
because dreamless sleep also called prajna by the mandukya upanishad is characterized by not having a mind or antahkarana and as characterized by ignorance like in waking and dreamless sleep (it is not the fourth state turiya) my sister now seems to think that death is absorption into complete nothingness, which is wrong ofc.
of course others thought this experience had mundane explanations like oxygen deprivation, i dont believe this is true.