I want to say I watched this movie around 2004-2007 but unfortunately I can’t be sure. It was either horror or suspense. I can’t remember the plot or who was in it, I can only remember the very end. It turned out the characters were actually all in a photo on the wall of a mental hospital. The killer/bad guy (if I remember right) was sitting in his cell across from the photo, imagining the whole movie. I apologize if this isn’t enough information, but it’s all I can remember and it’s driving me crazy. Thanks in advance!