Steve Kloves: a "haunting moment" in Half-Blood Prince
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.
o_O
Read the rest of the interview here.