Sora提示词：Vertical 9:16, ultra-HD smar

Vertical 9:16, ultra-HD smartphone footage, no flicker.
Knife remains EXACTLY identical to reference image.
Fast-cut montage, total 10s.

Scene structure:
1. Close-up: housewife picks up knife, tight grip.
2. Medium: fast, confident chopping of meat.
3. Close-up: blade slicing through meat, exaggerated clean separation.
4. Quick cut: knife held up toward camera.

Camera:
Handheld phone, slight shake for realism.
Quick cuts between shots.
Natural lighting, even and stable.

Style:
TikTok US viral kitchen knife demo.
No subtitles, no text.