Prompt
A sprinter and a giant rolling clock race side by side toward a single finish ribbon, isolated on a fully transparent background with nothing behind it, alpha equals zero, not white, not colored, no checkerboard pattern, a real alpha channel throughout. A 16:9 wide side view holds the runner in the near lane, the clock's rim rolling in the neighboring lane slightly ahead, and the plain ribbon stretched across both lanes ahead of them, every element fully inside the frame with clear margin on all sides.
The runner leans forward mid-stride with one knee driving up and the other leg extended back, both arms pumping, both hands closed fists with thumbs folded over curled fingers, exactly five digits visible or anatomically accounted for. The giant clock rolls on the edge of its rim like a wheel, its round dial facing the viewer with moving hands near the top tick and plain tick marks only, no numerals anywhere. The clock stays a wheel in motion, never a billboard, and both competitors visibly chase the same ribbon.
Surreal sports photography in crisp daylight with sharp focus and natural daylight modeling. The runner wears a plain unmarked singlet and shorts with no bib, logos, signs, or lettered surfaces anywhere, and the dial carries only hands and ticks. Both racers rest with a soft semi-transparent contact shadow in the alpha channel, darkest at the runner's striking foot and the clock's rolling contact point and fading outward, and no element touches or crosses the frame border.