Ok, let me show you something:
This scientific research shows that the cause of self-trancendence experience is caused by a decrease or impairment of
the right parietal lobe of the brain.
Neuroscientist Jill Bolte Tayler, who experienced 'self-trancendence' says in her book: "My stroke of insight': 'My spirit soared free like a great whale gliding through the sea of silent euphoria".
She thinks it's caused by an impairment of the left sight of the brain:
"On the morning of December 10, 1996, Jill Bolte Taylor, a thirty-seven-year-old Harvard-trained brain scientist, experienced
a massive stroke when a blood vessel exploded in the left side of her brain. A neuroanatomist by profession, she observed her own mind completely deteriorate to the point that she could not walk, talk, read, write, or recall any of her life, all within the space of four brief hours. As the damaged left side of her brain--the rational, grounded, detail- and time-oriented side--swung in and out of function, Taylor alternated between two distinct and opposite realties:
the euphoric nirvana of the intuitive and kinesthetic right brain, in which she felt a sense of complete well-being and peace; and the logical, sequential left brain, which recognized Jill was having a stroke, and enabled her to seek help before she was lost completely."
"Stroke of Insight" by Jill Bolte Tayler
I hope you don't ignore this contradiction in the scientific research...
You can see that a stroke in the right sight of the brain AND a stroke of the left sight of the brain causes the experience of self-trancendence.
My conclusion: the loss of brain functions in general will cause the individual going into trancendence.
Atman goes to Brahman.
The induvidual drop becomes part of the ocean.