You Again (2010)

Continuity mistake: In the post-rehearsal dinner scene where Marni and Joanna start fighting and throwing dishes, Joanna dumps a bowl of green soup over Marni's head. As Will is chastising both of them, the green slime on Marni's clothes and hair changes in each shot when the camera cuts back to Marni. It's most noticeable on her bangs, which are sometimes plastered flat against her forehead and other times are separated into spiky pieces.

Cal K.

Marni: High school was a horror movie. This weekend is the sequel.