radial blur

In order to do this I use the Quick Mask Mode and I make sure the colors you are using are black and white. After I finished making my selection with the Quick Mask Mode, I copied the selection to a new layer. Then (with the new layer selected), I applied a radial blur to the new layer containing the background. (Filter>Blur>Radial Blur). I used the Zoom Method for this situation. I used an intensity of 20, but that can vary depending on the picture. When I was done messing with the options, I pressed OK to see the results.
I love this picture because if you look at it for long it looks like you are getting lost in a spinning world of ducks.