I spoke with Rider, 57, over the phone. He told me that he used to be a welder, but a tragic accident forced him to go on disability. "I got crushed by a Bobcat loader about 12 years ago," he told me.

Air may be invisible, but it’s full of energy! Dr. Rob and the Crew ignite cotton with a torch tube, test syringes and squishy softies, and even launch rockets with compressed air. From bouncy bags to ...