Bob plays the HotHand

YouTube jkjelec. Via Kyle.
"Bob plays a modular synthesizer using two HotHand controllers from Source Audio. Sorry about the sideways part; it goes to a normal orientation about a third of the way through"

Update via Dave in the comments: "Bob Chidlaw is a legend and it was really cool hanging with him... a bit daunting maybe. It was like, 'Hi, I was the chief scientist at Kurzweil for 20 years." "Oh hi... I draw hamsters.'"

Some detail on the HotHand:
"The patent-pending Hot Hand™ family of products allows you to control audio effects through either hand or body motion. Consisting of a small feather-weight motion sensor and a floor-based control box, Hot Hand gives you a completely new means of expressive control without being limited by a pedal. Each unit groups a family of similar effects with enough selection and control to create hundreds of different sounds. Each product features a simple user interface, so there is never a difficult learning curve. These are our first 3 products, and there are many more to come."