Using zoom motion blur in your photos for creative effect
Motion zoom can be created by zooming in or out while taking a photo with a slow shutter speed. Using this technique you can take a mundane subject, and change it into a surreal and abstract photo.
You can start at your lens' widest focal length and then zoom in while taking the photo, or start at the longest focal length and then zoom out, each has a slightly different effect. You can try zooming in and out during one exposure for a combined effect as well.
Zoomblur by Andreas Levers on flickr (licensed CC-BY)