Gr8erDays on Instagram: "The epic disco scene from “Prom Night” (1980) was shot in 1979, as the disco era ended abruptly (Disco Demolition Night was July 12, 1979), so seeing movie-magic 16-year-olds Jamie Lee Curtis, 21, and Casey Stevens, 25, boogieing down at their prom felt ... out of step! “Let’s show her what we can do!” Jamie Lee’s character urges Casey’s, just before launching into their “Solid Gold” best, all a part of their prom theme: Disco Madness. Their moves were ... nothing if not