“Supersonic: Pushing the Envelope” takes you on a gut-wrenching, high-G, thrill ride of a lifetime. From the Navy’s elite flight test centre, to NASA’s supersonic research program, to Utahs Bonneville Salt Flats, we shred the myths of mach-speed. Cutting edge medical and scientific testing reveals just what happens when you push the outside of the envelope, and haul it back in again.