Revealing mistake: Immediately after Katie is cursed by the necklace, Harry, Ron and Hermione are in Mcgonagall's office talking about what they saw in Hogsmeade. Harry says, "It was Malfoy." As both teachers turn Mcgonagall says,"That is a very serious accusation, Potter." As she says this, she looks oddly transparent. You can see the window pane design through her robes, particularly in the shoulder. This continues to be true until she says "I suggest you go back to your dormitories." This could possibly signify a green or blue screen behind them. (00:54:10 - 00:54:40)
Harry Potter and the Half-Blood Prince (2009)
1 suggested correction
Directed by: David Yates
Starring: Maggie Smith, Helena Bonham Carter, Alan Rickman, Jim Broadbent, Michael Gambon, Daniel Radcliffe, Emma Watson, Robbie Coltrane, Timothy Spall, Julie Walters, Tom Felton, Rupert Grint, Warwick Davis
Genres: Adventure, Drama, Fantasy, Harry Potter, Mystery, Romance
Revealing mistake: During Quidditch tryouts, when Ron blocks the Quaffle with his head in the closeup, Ron's body disappears at the bottom of the screen below the digital editing line. (Only visible on fullscreen DVD).
Hermione Granger: She's only interested in you because she thinks you're the Chosen One.
Harry Potter: But I AM the Chosen One.
More trivia for Harry Potter and the Half-Blood Prince
Question: Why is Harry not punished by Snape for almost killing Malfoy in the bathroom?
Chosen answer: Snape wants to know how Harry knew Sectum Sempra. As shown by him using Occumelancy to see where his copy of Advanced Potion making is. But at the same time, if Snape punished Harry for a spell in a book, Harry could show it to Dumbledore, who would recognise Snape's handwriting. Additionally, Harry was certainly punished in the book - he got detention with Snape every Saturday for the rest of the term. The movie most likely had to cut this for time issues, and also perhaps because the scene is more dramatic if Snape only silently glares at him.
Suggested correction: She's not transparent. It's a trick of the camera. A glare from the bright window behind her. You notice you can't see the vertical slats of the windowpane. Only the horizontal. That's because the glare is carrying across her body horizontally and where the horizontal slats are there's no light to cause a glare.
Garlonuss ★
I can see the horizontal and vertical ones through both McGonagall and Snape. I can even see the desk through the middle of her body.