Tip your head forward so that your hair covers your face, click your shutter button HALF WAY to focus the camera, whip your hair back and about mid whip click the shutter button fully in.
These literally took me all of five minutes, you could end up with something pretty darn cool if you put more thought into it. You can get some really interesting pictures this way, try walking quickly, swirling about in a flowing dress, even just putting lipstick on. The slightest amount of movement will cause the blur. If you want to play, try aiming your camera at moving traffic - it looks amaaazing at night!
If you spot any photographs with interesting lighting effects, leave me a link! I'd love to try and recreate them :)
(P.S) If you're interested in the effect of swishing your hair with a fast shutter speed, check out Silhouette Skies post here. Her blog photography in general is lovely!