Originally Posted by Nightshade
No they don't have to move fast but they do have to move for the duration of the shutter.
First shot most likely exposed for about 1 second, note the consistency of motion in the background. A longer exposure (give or take) would have resulted in the white lights blowing out the shot and making it unuseable.
edit: the shot you posted has a fast shutter speed (note stopped background with almost no blur). My guess is 1/250 shutter speed.
i know

h: i was merely trying to point out the different between rolling shots (my pix) and the slow-shutter shots

but like i said earlier, the 1st shot had the car moving at a slow speed (5mph sounds abt right) and having the shutter open for abt 1-2 secs... anyone in so cal wanna help me do a shot like the 1st pix?