Video prompt: A cyclist coasts down a rural dirt path, lined by fields of tall, golden corn. The sun hangs low in the sky, casting long shadows as a flock of birds flies overhead.
Defect: Deformation (any reason involved with a movement)
Explanation: While the person is cycling, their legs undergo shape distortion, showing abnormal form changes. Additionally, instead of alternating, only one leg appears in the upward position and one in the downward position, which is inconsistent with natural cycling motion.