This is my first attempt at using the SB-900 in repeat mode or SU-4 mode
Taken with a D3s and 24-70mm f/2.8 lens.
The main light is an SB-900 in a Lastolite ezbox. It is set to SU-4 mode with repeat on.
The fill light and the commander is an SB-900 attached to the camera via an SE-29 cord. It is set to RPT mode 8 times at 10 Hertz. It is being bounced off a silver reflector to the front of the camera.
This ended up taking about an hour to make the set up and get the exposure. (This is all one exposure by the way :) )