Video prompt: A heart-pumping white-water rafting adventure through roaring rapids, with rafters paddling vigorously to navigate turbulent waters and maintain their course.
Defect: Deformation (any reason involved with a movement)
Explanation: The group of people rowing the motorboat experiences slight shape distortion at the broad ends of their paddles, where the paddle tops subtly warp and change form. This minor deformation creates an unnatural look, disrupting the otherwise expected solid structure of the paddle tops.