I really like the blurry effect on the tunnel walls and ceiling in this photograph by Joko on 500px. I get disappointed with my pictures when I see something like that. Can someone explain me how he did that? Is this kind of Photoshop effect, or some kind of technique?
It looks like the photographer used the zoom effect. It consists in zooming in (or out, but mostly in) while you are taking the picture. Not before, not after, but while you are taking the picture. You can read more about this particular effect here.
It's pretty difficult to achieve, and takes a lot of practice. You'd want to use a tripod and long exposure time, as well as a small aperture to have a higher depth of field with your subject in focus.
I think it's a combination of zooming during a long exposure, with flash so that there is a sharp exposure of the figure.