Chamber of Secrets - after the credits

The local paper said that there was an extra “scene” after the credits. I read this after I saw the movie, and I’m not going to see it again just for this. Anybody want to enlighten Munch here?

The camera slowly lowers on Diagon Alley and rests looking into the bookstore where we see a new poster advertising the book “Who Am I?” by Gilderoy Lockhart. The (moving) picture features Gilderoy in a straight jacket looking rather perplexed.