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Create a polished 15-second 3D comedy short starring one adult with dense curly hair at a bright bathroom vanity. Divide the duration into four timed beats with continuous action and no cuts. Beat one (0–4s): medium shot from slightly below eye level as the adult gathers a cloud of curls toward the crown, pins catching one coil at a time, expression focused and hopeful; soft morning key light from a side window, cool fill from mirror bulbs, gentle bounce on the curls. Beat two (4–8s): slow push to a close-up as the last pin slides in and the bun holds for one proud beat, a small smile forming; light stays clean and flattering, highlight tracing each curl. Beat three (8–12s): the bun springs apart in a physically plausible cascade—coils unwinding, pins flicking free with elastic snap, hair fanning outward—while the camera eases back to a medium-wide; keep the motion comic but grounded in real curl weight and recoil. Beat four (12–15s): the adult laughs, shoulders dropping, and shakes the curls loose with both hands as the camera settles; warm practical vanity glow returns. Direct native audio: quiet room tone, soft rustle of hair, tiny metallic pin clicks, a rubbery spring release, then an open genuine laugh. No dialogue, no music swell. One adult subject only, stable face and hairline, realistic fabric and skin, no brand marks, no watermark, no extra hands, no child. User request: An adult with big curly hair pins up a bun at a bright vanity, it springs apart, and they laugh it off.