How can Jared Rydelek hammer a four-inch nail into his nose without causing serious brain damage? What keeps Trever McGhees feet from burning to a crisp as he walks on burning coals? What allows Jessica Wilson to stay underwater for over six minutes on a single breath of air without drowning? And how can Franz Mllner physically hold back a top end sports car at full throttle? Find out as we follow a team of experts as they decode the science behind these bizarre stunts to tell us why they aren't...Humanly Impossible.