Thank you for sharing, I think this was great abstract animation. The only drawback was that it was so short. But like jorgy wrote, you can watch it over and over and never get bored.
rpc9943, I've use several effects, but that "hard" motion-blur can be simply achieved if you active the motion-blur in the Layer Settings and set the Blur radius to "0". You can play with the other settings... One cool thing can be done with the Frame skip setting. With "1" you get a nice, fluid movement. With "2" (or bigger, I think) the whole object seems to move over the time of the animation (like, ähm, a sandworm or so).