Some of the best comics are “let’s go inside someone” comics. And I don’t mean anything sexual by that. In Avengers #140, Hank Pym passes out and Vision phases into his bloodstream to fight bacteria and stuff like that.
Reminds me of my favorite issue of Iron Man, in which Hulk hits Tony so hard his armor shuts down and Ant Man (Scott Lang) goes inside the armor to save him.
Great stuff–Bob Layton is one of the most un-remembered, under-appreciated guys around. Give him some love.