Video prompt: The sun filters through the canopy, casting dappled shadows on the forest floor. With a determined look, he tightens a few bolts and adjusts the carburetor. The air is filled with the scent of pine and gasoline. He wipes his greasy hands on a rag, stands up, and gives the kickstarter a firm push. The motorcycle sputters to life, its engine roaring with a deep, throaty growl that echoes through the trees. Satisfied, he grins, revs the throttle a few times, and then hops onto the seat. As he rides off, leaves swirl in his wake, and birds take flight from the nearby branches, startled by the sudden burst of sound and motion.
Defect: Blurring (abnormal blur, e.g. one bird of a group blurs)
Explanation: The person and the motorcycle appear heavily blurred and tangled together, creating an unrealistic effect as they should remain distinct and clearly defined.