Harry Potter and the Chamber of Secrets - Petrified Head?
Go to the part where Harry, Ron, and Hermione are walking down the hall and see the petrified Mrs.Norris hanging from the torch. Her head is clearly turned the other way so you don't see her face. But when the hall fills up with students, the camera changes angles. Now look at her head, it is now facing the students. Not that big of a deal but i'm bored so what the heck?
to see the movie