This shot was fairly easy to acheive. I just stood on a street corner at a busy intersection in downtown SF. As cars passed through the intersection I took a panned shot. I had preset the focus and the shutter set was at Time Value mode of between 1/30 - 1/50th of a second. This particular shot came out well, becsuse the driver is in great focus. If you view the larger image you can even see him blowing out smoke.

Neat pan shot Alex! I haven't tried a lot of these, it is a cool effect. Nice work! Don