A lot of long exposure photos are really experiments with someone extending the shutter and waving the camera around. That is a perfectly legitimate way to achieve wonderful images. Nevertheless Origin of a Whirlpool is a wonderful example of the exact opposite process, where someone took the time to figure out how to achieve an exact geometric shape and reproduce on it on film. The time and craftsmanship of the photo becomes apparent, the final result stunning and mesmerizing. One that forces the viewer to examine it very closely only to realize that you will never understand how it is done just by looking.