In 1959, one of the hot shows on TV was a new anthology series called Twilight Zone...
...which specialized in surprise endings, turning everything topsy-turvy at the climax, much like this never-reprinted short story from Atlas' World of Fantasy #19 (1959)
Probably written by either Stan Lee or his brother Larry Lieber and illustrated by Joe Sinnott, the tale's not bad, but the over-written explanations in the last few panels make the city's residents seem like a bunch of sadistic, smug SOBs...