One Exposure HDR

There's been much talk about HDR in the last year and how you have to take multiple shots of exactly the same thing. Unfortunately there are times when this isn't possible, whether it be because you are tripodless at the moment, or there's some action in the shot. Fortunately, if you're shooting RAW files there's hope. (You are shooting RAW right?) Eirikso has a technique for creating HDR images from one RAW file.