swirling rocks

Across the road near the roadworks they'd parked one of the pointy roller machines, which are like the rollers with flat cones except they have blunt spikes. Anyway, these little dirt crumbs were resting on the side and I was experimenting with twisting the camera while taking a photo. This is the result. I'll post another photo that is like this next.
This photo was taken on Monday 31st March 2008 at 17:40:51 PM, with an exposure time of 1/30 of a second and a f-number of 2.9.