Strobist Info: One small pop-up flash from a Nikon DSLR in front. So technically this is off camera flash.
I think it is interesting to see that the whole picture is defined by the intended motion blur as a result of panning. But there is also the flash of another shooter in front. I captured it as I was dragging the shutter. The flash froze part of the biker (look at the camera-left side of his upper arms and his glasses) and a huge patch of street directly in front of the wheel on camera left.
ski 9, Ruby Girl, coschda, MattAdamsPhoto.com, and 197 other people added this photo to their favorites.

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Tobymutz 21 months ago | reply
an excellent & serendipitous motion blur capture shot!
Lightnomad 9 months ago | reply
great dynamic!
wanzaharah 2 months ago | reply
beutiful
Project Casting 2 months ago | reply
This picture is wonderful! I'd like to use it in our blog www.projectcasting.com scheduled for posting March 2013, with your name given with photo credit and a link back to your flickr page. If you do not wish to have your work reproduced then please email me back at admin@projectcasting.com with a link to the picture and I'll have it removed from our postings. Thank you for sharing on creative commons!!!