The Obscure Adventures of Comics' Greatest Generation!
Much like the early adventures of Superman (to whom he's often been compared), the nascent Captain Marvel was a surprisingly ruthless fella. So much so, one would think the "H" in his magic word "SHAZAM" should have stood for hardcore instead of "Hercules".
Case in point: This little incident from Captain Marvel Adventures #1 (1941), as told by a couple of guys named Joe Simon and Jack Kirby.
(click on the panels for a larger view)