By Tanner Garrity In Margot Robbie’s memorable Hot Ones appearance, she shares that a professional freediver taught her how to hold her breath for full five minutes, as part of her preparation for the first Suicide Squad film. Robbie tells host Sean Evans that, with proper training, he could also learn how to hang out underwater for an absurd amount of time: “He teaches you how to take a deep breath, how to expand your diaphragm. [But] the most important thing he teaches you is what happens when your body is deprived of oxygen. Once you know, it isn’t that scary once it starts happening. You’l…