The Flash #275

A masquerade party turns genuinely dangerous on this striking 1979 cover by Dick Giordano, where the Flash and a woman in a Batgirl costume find themselves cornered by a goggled gunman in a wide-brimmed hat shouting "Zap! You're dead!" — while partygoers dressed as Superman, Captain Cold, and other heroes and villains mill about in the background, blissfully unaware. A partially visible invitation ominously promises "The Last Dance" and the witness of someone's death, raising real questions about who among the crowd is a reveler in costume and who might be something far more threatening. It's a wonderfully tense setup that makes clever use of the masquerade conceit, drawing readers straight into the uncertainty alongside the Scarlet Speedster himself.