Love the shot. The reference to "red 580EXii" implies that the shot was originally intended to be seen in color, right? So, looking closely at the saw body and blade I have to guess: the 580 was attached to the motor body of the saw but set so that the light angled back at the bottom of the blade. A grid or snoot might have been attached. Without the color cue it's hard to know how much red light was cast forward toward the viewer.
Client? Self-assigned? Tell us about the idea you were asked [asked yourself] to create.
I love doing setups like this!
The artist is Dad, Gary Goren, and the portrait is at least a publicity shot and will likely also make an appearance in a coffee table book of his art that I'm working on. I'll attach a shot of one of his works, the first one that's actually going to go in the book, that I finally was able to get this past week.
The hotshoe flash was mounted to a light stand and positioned just on the other side of (and hidden by) the saw's swivel post on the left side of the frame. No grid or snoot; just a piece of red gel taped over the head.
I had a vague thought of using the red as a bit of mood lighting in addition to its ability to freeze the motion of the saw blade, but it was much more useful to be able to selectively adjust the exposure of that part of the scene in post using the channel mixer in Adobe Camera Raw.