How do you hold your breath for 17 minutes?

TIME.com: “In order to maximize the amount of air taken into the lungs before apnea, Blaine, among other divers, inhaled until his lungs were filled to their physiological capacity, and then forced additional air into the lungs by swallowing, hard. Using this technique, Blaine was able to cram another quart’s worth of air into his already full lungs.”