In the opening scenes, following the two men observing different accidents, some of the crowd scenes, including those witnessing the unconvincing "man" falling from a roof, are from an extremely old film, perhaps even a silent; the clothes they are wearing look from about 1928 vintage, though this story is a contemporary (1956) one.
Reportedly, Spike Lee has claimed this episode was one of several inspirations for his film Do the Right Thing (1989), which itself is set against a summer heatwave.