Will he shrink away to nothing?
The ending implied that at a sufficiently small level, there are new universes....so he would enter a micouniverse, but as a gigantically huge presence, and would likely be considered a god by the tiny inhabitants thereof.
He found a harbor in his wife's vagina.
that the oxygen molecules would be to big for him to breathe, and he would die of asphyxiation. The sun shone, having no alternative, on the nothing new. Samuel Beckett
Not to breath, to BREATHE !!
Yes. My real name is Jeff