I have not attempted this before so I thought I would give it a shot. I am amazed with the outcome! I have taken a shot of my setup so that you can see just how easy it is to capture these kinds of images.
I set my Nikon D800 in manual mode and used a shutter speed of 1000/s @ F16 and the built in flash as a commander for my Nikon SB900. I have included a picture taken on my iPhone of the setup I used. Great fun and thoroughly recommended.