One of the most endearing aspects of Superman comics during the 1950's and 60's was their tendency to cram insane amounts of expositional (or explanatory) dialogue into single panels. Since each issue featured three stories of only eight pages each, the necessary compression resulted in word balloons jam-packed with summarized information.
The point of all that exposition was to quickly bring new readers up to speed on the increasingly complex cast of characters and concepts of that era's Superman...resulting in surreal panels like this beauty from Superman #113 (1957). Despite his weakness and impending death from a massive chunk of Kryptonite, Superman still manages to explain Kryptonite's effect upon him, as well as humanity's immunity to the deadly mineral....out loud....to nobody in particular.
I'll be sure to keep my eye open for more Great Moments in Exposition.