Okay, this is going to be an interesting thread. Many movies out there have little glitches in them. From characters refering to each other by their actor name to hair changing length to things going in one direction when they should be going another. How good are you at catching movie mistakes? Here's one. In the movie "Grease" at the slumber party, every time the camera changes position, someone else is holding the wine. First Sandy, then Jan, then Sandy, then Jan.