My submission for week 35 of the 2013 photochallenge. The theme for the week is work. Of course, as an academic, I don't see much of that (particularly during the summer), but this is about what it looks like on hard days.
Strobist: LP1610 in a Lumiquest SBIII from camera top, 1/16 power, triggered by 430exii on the hotshoe pointed backwards. The on camera trigger is necessary to get the second curtain at the end of the exposure to freeze the action once the blur had burned in from the ambient (my PWs don't do second curtain sync).