close up of the ass and upper thighs, a woman with a short white tennis skirt, flashes of white panties under the skirt, big bouncy ass, the woman is walking, back view. Create smooth, natural, cinematic motion without warping or deforming, Avoid adding artifacts, hallucinated objects, extra limbs, or distortions or unattached body parts. Produce a cohesive animation with stable details, consistent textures, and clean frame transitions.