This photographic technique is exactly as it's name suggest - the photographer intentionally moves the camera while taking a photo. Warning! A lot of people do not like this effect so if you try it be prepared for negative feedback. I personally love it. If anyone is interested in learning more about how to do this, the following site may be helpful:
My photo was taken yesterday (when it was sunny in Auckland). This is the sort of technique which takes a bit of practice. I took quite a lot of images but was pleased to have a handful that were worth keeping. Thank goodness for digital cameras.