Harry Potter and the Half-Blood prince is better than the last Harry Potter movie, but there are a couple of things added that did NOT happen in the book and do nothing to improve the movie. First, is the scene where the Burrows is attacked and set on fire. The Weasley house does not catch fire in the book and no further mention of the occurrence is made in the movie. Just before the fire starts Harry is seen running out of the protection surrounding the home into the night. Now, come on. Would Harry really do that?? The second is right before the death scene where several Hogwarts students are seen loitering in the hallway late at night apparently drinking and possibly snogging. Highly unlikely Hogwarts rules would permit such behavior!