Video prompt: A couple is holding hands and walking in the starry sky, while the stars move dramatically in the background.
Defect: Temporal Problem (if water is spilled then no water in cup in later frames)
Explanation: The background shows a time-lapse of stars and the Milky Way, while the couple moves at a normal, steady pace. This mismatch in time scales is unrealistic, as both the background and foreground would naturally follow the same time flow if they were filmed together.