Video prompt: A commercial airplane descending into an airport over a densely packed urban area at dusk, lights twinkling below.
Defect: Deformation (when Object is involved in an act,  anything in this process that's weird. e.g. people walk into a wall. "Walk" is an act)
Explanation: Carefully observe the movement of the fuselage; you can see that its shape undergoes slight deformation as the plane taxis.