Hunyuan Video I2V Vertical 9:16 video, pure green screen background, static camera. Dozens of black flip-flops falling from top to bottom continuously. Each flip-flop: black rubber sole, single wide strap across the toe with exactly four white parallel stripes on it. No variations in design. Every flip-flop rotates simultaneously in all axes (roll, pitch, yaw) at unique speed and phase. Objects overlap heavily — foreground flip-flops occlude background ones, dense multilayered stream. Density increases over time: by final frame entire screen is completely filled with flip-flops, zero gaps anywhere. Photorealistic product render, detailed rubber texture, soft studio lighting, subtle motion blur from rotation only. No floor, no shadows, no feet, no text, no logos. Duration 4 seconds, loopable.