“My grandfather went on this one time,” Rachel Bloom effused on a recent afternoon. “He thought he was going to die.”A writer-performer best known for the cult musical comedy “Crazy Ex-Girlfriend,” Bloom was standing at the base of Coney Island’s Cyclone, the 96-year-old wooden thrill ride designated as a landmark by American Coaster Enthusiasts. “I just had this thought of, we’re all going to die someday,” she said. Something like riding the world’s second-steepest wooden roller coaster, which boasts 60-mile-per-hour speeds and an 85-foot drop. Bloom — brisk, animated, with a mind that sometimes outraces her mouth — apparently finds a 3.75 G-force relaxing.

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Persons: ” Rachel Bloom effused, ” Bloom, ”, Lucille Lortel, Bloom Organizations: Coney Island’s Cyclone, American Coaster, New Locations: Coney Island’s