H's swift solution to our most recent Stupid Hero Quote, Absorbascon regular Jer pleads, "Wait - you can't leave us hanging like that. We need DETAILS, man! What sort of story would lead to a quote like that from Superman? *choke*"
Your wish is my command, Jer! The answer is, your typical Supergirl story in 1972 *sigh*, the kind that only E. Nelson Bridwell could have concocted.
Supergirl is clothes shopping (she did that a lot; was she Superman's cousin or Katy Keene's?). A pushy saleslady shoves a pair of sunglasses on her, which, as one would expect in 1972, were mind-control specs devised by a world-conquering alien who says things like, "Silence! A situation has arisen that will permit us to witness this creature's amazing speed and power!" I just love it when villains say, "Silence!"
Supergirl is forced to trick Clark Kent into wearing a pair of mod mindbending eyewear and he in turn tries to foist them upon the JLA. The plot might seem familiar, because one of the Star Trek the Next Generation writers remembered the issue and lifted the plot entirely for a Wesley-saves-the-day episode (Hi, Wil!).
There's also a soul-renching subplot of familial conflict between the alien conqueror, his brother, and a fuzzy magenta subhuman. I know I wept.
Like many circa-1972 stories, you could devote one entire weblog to exploring its wackiness and nothing else for an entire year...