Fun, fizzy dispatches from the city and beyondShe admired the knockoff “Austin Powers” costumes, such as “60’s Mr. Mojo,” then strolled to the killer-clown section (separate from clean-cut clowns), where she tried to recall Halloweens of her youth. “I have to do a little bit of work to access my childhood in general—give me one second,” she said, tapping fingers against her face and arms. She explained, “I’m just doing a little E.M.D.R. to launch myself back.” (E.M.D.R. being eye-movement desensitization and reprocessing, a psychotherapy trauma treatment.)“My parents were sober when I was growing up,” she said. “And, oftentimes, when people don’t do drugs or alcohol anymore, they have to have something fun—in many cases that’s sugar. So they would do drug-addict behavior around my Halloween candy. They’d be, like, ‘O.K., guys, you can have nine pieces tonight and then we’ll talk tomorrow about how much. . . . ’ And my candy would be gone in the morning.” Einbinder’s mother, Laraine Newman, was one of the original cast members of “Saturday Night Live”; Newman posed as a vampire for a 1978 issue of High Times, which described her as a “skinny spaced-out sex symbol.”In “Miasma,” Einbinder and Anderson have sex on a fireside carpet of candy wrappers, which were not added in post. “Yeah, that’s all practical—practical sex, practical candy, no extras there,” Einbinder said. It turned out that she and Schoenbrun are both “total sugar-heads.” Einbinder has a particular taste for sour. “I recently went to a 7-Eleven that had the new BUBS, which is a Swedish candy. They’re like diamonds,” she said, reverently. “They’re flavored tutti-frutti, which is not really in the American palette. It’s somewhere in a bubblegum sort of citrus-forward area.”She turned her attention to a “Pit Dweller” costume (one size fits most, up to six feet, two hundred pounds) that was basically a skin suit, with bulging ribs, long bloodied fingers, and a gaping fanged mouth for a face. It hung near a classic skeleton costume. “So, it’s actually exciting, because you can look to the influence,” Einbinder riffed. “ ‘Pit Dweller’ was only made possible by ‘Skeleton Adult Costume,’ which we can clearly see as a response to the First World War.”She contemplated how comedy related to horror: “I think there’s something similar in the body, this buildup of tension followed by a release of sorts.” She set a crown on her head at a jaunty angle and described the petite mort she shares with Anderson toward the end of the movie, which involved a lot of fake blood spewed out of their mouths from edited-out tubes. This, to an outside observer, seemed like it might be funny to film. “Nobody broke,” she said. “I was just, like, ‘Oh, hell no. Let’s get this in one. Let’s fucking nail this.’ ”“Miasma” was shot at two camps in British Columbia; Einbinder, who grew up in L.A., went to Buck’s Rock summer camp in New Milford, Connecticut. “It was, like, no groups, no schedule, glassblowing, metal shop, loom,” she recalled. “There was weaving, and animal-farm-clown theatre,” which sounds scary but apparently wasn’t. Did anything spooky happen there? She considered. “I got a tick.” ?