The LA Times has a new interview with Steve Kloves, the screenwriter for all the Potter films except for Order of the Phoenix.

What, if anything, can you say about the climactic moment between Snape and Dumbledore? In the book, it’s a short but intense scene.

It is informed by everything [Potter readers] have come to know is true. So if you watch the film carefully, there are performance moments that are quite extraordinary, Alan Rickman [who plays Snape] especially. There is something we added that you can look forward to, a short scene between Harry and Snape prior to the big event. It’ll be interesting to see how it plays to the audience. It should be a haunting moment for Harry. While I was writing, I just had a notion about a moment between him and Snape, something Harry could look back on and question as to why he didn’t act differently.

Thanks The Leaky Cauldron!