The horse is energetically headbanging like a crazy rock fan, violently shaking its head up and down and side to side. Its mouth is open in a wild expression, mane and forelock are flying wildly and blurring from the fast motion. The horse's ears are flopping. Dynamic, rapid motion, intense and funny. Keep the horse's body stable in frame, only head and mane move. 5 seconds, 9:16, realistic style.
