His method involves using a Pocket Wizard wireless transmitter and a camera trigger to fire the camera remotely. I have had some luck getting similar shots with using a USB cable to tether the camera to a laptop, although Jarvis' method provides much more range and flexibility. For safety, you should always cable up your camera if you're attaching it somewhere it might fall. You can find safety cables and the other equipment to try this technique at Nikoncable.com.
(Photo: Chase Jarvis)