Shutter Speed, week of Sept. 15

Now we're going to try some blurred motion. To create the effect of blurred motion, part of the picture must be sharp and clear (the part that's not moving) and part must be blurred. Look at the two pictures from last week below and see how, while the water in one is blurred, the lock around is sharp (well, relatively). I've posted examples here from Grand Central Station and Times Square.

Please add your comment about HOW you'll create blurred motion (hint: think shutter speed) and WHAT your subject will be.