[2007 Update: This photo will be on display at the Center for Arts in Natick (TCAN) during May and June for their "Focus on Natick" photography exhibition.]
Action shot of the 2006 Boston Marathon, taken at mile eight where the runners are still packed together tightly (see this shot to get a sense of the density).
This is a detail of a photo taken from a tripod about a foot above street level. I tried several different shutter speeds and made about 20 exposures. This one at 1/30 was the most successful.