Interesting indeed! It's also one of those images that looks better larger than small; I think that's because the motion opens more and more avenues of investigation. As Eric mentions with the spokes - you wonder why, and try to figure out the relative maths of which parts are moving more rapidly than the whole - and is it about the whole subject moving or is it more a product of the camera doing the twist?
I also like the colour - please don't anyone tell me that there isn't any, that it's my monitor!
Again, an image that deals with subject and not how wonderful the camera used, whether the lens an apo. an aspheric or not...
Isn't it nice when photography moves beyond concerns about the hardware?
Rob C