You are into some weird shidt Greg! That whole thing reminds me of the abyss, I don't know if the younger generation have seen it but it's a great movie. They were doing experimental enriched oxygen where they flood your lungs with fluid, the same idea of when you are a baby in the womb.
I always say that it's amazing that both wetsuits and scuba tanks haven't evolved a ton, say compared to electronics. There are carbon fiber tanks etc, but they all still rely on compressed air. I wonder how long until they have mouth breathing units like the jedi have, where you pop a reg into your mouth and it pulls o2 out of the water. One of the reasons I hate scuba for work is putting that heavy tank on.