Turn the uploaded photo into a 5 to 10 second vertical 9:16 clip of the Shaking Head trend, photorealistic, like a real phone video. Star: exactly one recognizable subject from the uploaded image, whether an animal or a human. Retain the animal's breed and coat pattern, or the person's facial identity, hairstyle and complexion, as applicable; it must stay recognizable while its eyes are shut. Framing: tight close-up at the subject's eye level, head and upper chest filling the frame, face in the upper middle and turned to the lens. The phone does not move: no cuts, no zoom, no pan. Keep the room and light from the photo. Beat 1: eyes squeezed tightly closed, a smug closed-lip grin with chubby cheeks, while the head turns slowly from side to side, like someone who knows exactly what they did. Beat 2: eyes snap open, huge and round, locked on the lens; the mouth drops open a little and the tongue tip sticks out, head still wobbling softly. Timing: divide each cycle into equal halves. Perform Beat 1 during the first half, trigger Beat 2 sharply at the midpoint, and sustain the revealed expression for the remaining half. Use one cycle for a five-second output; for longer outputs, repeat the cycle once. Only the head and face move; the body stays put. Keep the sideways head motion gentle and fluid, but make the change from the smug expression to the startled stare instantaneous. Audio: a light, bouncy instrumental loop. No barking, meowing or speech. Avoid: additional subjects, visible hands, clothes or accessories that are not in the photo, morphing, text, captions, stickers, logos, watermark. Leave space at the top for your own caption.