Generate a 15-second vertical cinematic suspense short film.\n\n[Characters]\nA young convenience store clerk, wearing a dark uniform, with a vigilant expression.\nA stranger wearing a hat, standing outside the cashier counter, deliberately hiding their expression.\n\n[Scene]\nA convenience store on a stormy night.\nCool white lights flicker slightly, rain slides down the glass windows, and neon reflections are on the ground.\nThe overall tone is cold blue-gray, quiet, oppressive, and filled with suspense.\n\n[Scene 1: 0-5s | Suspense Emerges]\nThe shot begins with a extreme close-up of a coin rolling in the clerk's palm.\nThe coin reflects the cool white light, and the camera has a slight breathing jitter.\nA quick whip pan to the clerk's face, instantly focusing on his eyes.\nThe clerk whispers: "What exactly do you want to take?"\nThe camera performs a slight push-pull zoom, creating an oppressive spatial change in the shelf background.\nThe clerk turns and passes the freezer, a packaging bag brushes past the lens to complete a natural transition.\n\n[Scene 2: 5-10s | Conflict Escalates]\nA high-angle shot of the clerk reaching down to grab the door bolt under the counter.\nA low-angle shot close to the ground follows the stranger as they step forward, shoes stepping through water tracks.\nThe camera moves half a circle around the two, showing the distance between them shortening rapidly.\nQuickly switch between three shots:\nClose-up of the door bolt;\nThe stranger's hand hidden in their sleeve;\nThe flashing red indicator light of the security camera at the top of the store.\n\n[Scene 3: 10-15s | Revelation]\nA tracking shot backing away follows the stranger as they continue to approach.\nThe lights in the store suddenly go out and then turn back on.\nA quick whip pan back to the clerk's face as he looks up at the security camera.\nThe camera slowly pulls away, and the clerk says: "Don't worry, the monitor has been on the whole time."\nFinally, it stops at a wide shot of the convenience store, retaining the sounds of electricity, rain, and the faint beep of the monitor.\n\n[Visual Requirements]\nCharacter identities and clothing remain consistent.\nMovements follow realistic physics.\nCamera movements are continuous and smooth, avoiding meaningless shaking.\nMovie-level lighting, realistic rainy night ambient sound, and slight film grain.