Something something the oxygen meter going up and Simon somehow having enough air for days longer then he should and how the sub essentially becomes a part of Simon and how blood carries oxygen and what is the purpose of a real Iron lung anyways and iron is what carries oxygen in human blood after all and the blood trying to make him one with the ship because it was already breathing for him and the eldritch forces genuinely can't understand why he's still fighting to maintain his autonomy and sense of self in the face of something so much bigger than him, when it would just be so much easier and less painful to allow himself to be subsumed
Something about the indomitable human spirit in the face of something that's so incomprehensible that it can make metal breathe for you
