Here's a quick behind-the-scenes video my friend Dave shot while assisting on last week's promo shoot with Minneapolis rockers Attracted to Gods.
You can see a little of the flash setup with the three Nikon SB-600s, Alien Bees B800, and Nikon SB-900, which acted as the trigger/commander. All three speedlights are pretty plainly visible, while the AB monolight is on the heavier stand you can see at about 0:05 into the clip.
In case you missed them, you can view the full set of images we made during the shoot here, along with a bit more about the flash setup.