Video prompt: A Boxer with excited enthusiasm bounds around a dog park, inviting play with each exuberant leap.
Defect: Deformation (any reason involved with a movement)
Explanation: The dog's movement trajectory is extremely unnatural, with its front paws oddly sticking to its mouth in a bizarre manner. Additionally, a second, animated mouth unexpectedly appears between its nose and the original mouth, creating an implausible and unsettling effect.