This effect was generated in Filter Forge, a Photoshop plugin that allows you to create your own filters.
This filter applies a radial blur to your image. You can smoothly transition between Spin, Spiral, and Zoom effects using the angle slider.
*Special thanks to byRo for his brilliant Spherify & Un-Spherify techniques which lend much of their logic to this effect.
radial blur blurry zoom spin spiral gaussian motion polar coordinates warp angle vortex uber zev
This filter has earned its author one of our rewards. They are given to the authors of popular filters and include a free copy of Filter Forge.