Flow Motion -
Back at the house, the shots are quickly keyworded and renamed, and I see that. . . this is rather interesting! It's not the same sort of motion blur that was read about - this was less agressive, leaving some detail for an interesting effect.
The blur on the outer edges gives the otherwise static elements a bit of energy. The seeming lack of blur of some of the water flow contradicts this, giving an impression it was two images combined with masks. This particular shot I believe was done by rotating the camera clockwise slowly about the center AF point, squeezing the shutter mid way through the motion.
For me this is quite an interesting effect on a rather common compostion.
However, I could understand if it induced nausea in some.