I saw an image with movement (made in PSP) and thought I would try too!
I had this old photo of an old american car cruising the coast.
This is what I did:
Dublicated and used the selection tool on the car, Refine and saved on a new layer.
Back to the dublicate and motion blur 180 at 100%.
Masked and erase in the front of the car.
Then Rectangle Marquee tool behind the car to get more blur there, feather the rectangel to smooth it.
Before and after