For this one you're going to need an image that you want, I think it might look better if you have more than one thing in that image, but it's your choice. Then you open that image in Photoshop and chose the Selection Brush Tool, after that you change the mode to Mask and start to color in the thing you don't want to be blurry. Then you go to Filter-Blur then you can choose the kind of blur you want. I chose the Radial Blur, and the Radial Blur looks like the top picture. At the bottom you can find the original picture.