JF Ptak Science Books (Continuing Post 1140)
I don't know why, but I cannot remember ever having seen an x-ray of an atomic explosion taking place inside of a person, before today. I guess that Superboy's body is susceptible to x-rays but is also at the same exact time capable of preventing a nuclear explosion from escaping his body--all except for the "nuclear fire" coming from his mouth.Now that's some sort of body control! The men in white seem pretty confident, being so close to the Trinity-like action and all.
Superboy evidently needs fewer ribs than humans, and it looks like the detonation point is right on the transpyloric plane, taking out kidney, liver, gall bladder and just about everything else. And his spine doesn't show up, either--along with a lot of other innards.
The original (published in September 1964) comes from the Oak Ridge Associated Universities, and they point out that this issue comes right after the signing of in-air nuclear weapons testing ban (after a speech by JFK in June 1963, marked by a memorial that was about 10 feet away from where I used to practice the shot put in D.C.)
This mushroom cloud doesn't take place inside of Superman, but it does seem to take place, well, oddly--there was no text that I could find that accompanied this image, so we'll have to leave the story arc to imagination.
And, well, if you're not having an atomic explosion in your stomach and not combating one, I guess as Superman you could cover one (image found here):