I understand how difficult it is to make such an enormous book like Harry Potter and the Half Blood Prince into a movie, but sometimes maybe it shouldn't be attempted. So much of the detail of the subplot of Severus Snape's upbringing and other small, seemingly insignificant parts of the book were left out of the movie that it all added up to be a sparse, badly written comedy movie. Once again, Daniel Radcliff failed to act better than he did when he was 11.