I came across these amazing pictures on a Japanese fashion blog this afternoon by Natsuimi Hayashi. All of her images have a sense of movement about them which makes them look really arty and of course they have been heavily photoshopped. Many of the 'highly hyped' users of Lookbook.nu also use this technique to bring a new edge to their photos and I've always wondered they did it.
I've now found a really great youtube video (which is more technical than fashion) that shows you exactly how to do it!
Soon you'll be watching me levitate around the streets of London once I get my fingers fiddly on Photoshop!
Check out the video, its fascinating!