What makes some of us deathly scared of rollercoasters and others not afraid to jump out of a plane with only a thin piece of muslin to slow our descent? During this hour we'll explain these differences between humans, while demonstrating some of the craziest ways we satisfy our yearnings for speed. With host and test driver, Jeremy Clarkson, we'll take you from the hills of New Zealand to see a plane with no wings that can reach speeds up to 80 mph, to the bobsled courses of Sweden, where Jeremy learns first-hand the taste of true fear.

The daredevils of the world come out in force to give interviews and demonstrate their individual talents, including rally champion Colin McCrae and world-champion race car driver Michael Schumacher. Jeremy turns to science to figure out why it's easier for some people to perform these amazing feats and how their able to do it. You'll also see the future in the Euroflyer, a plane that can fly itself and uses the voice of a housewife and a computer to communicate with its pilot. Then we go to Wales, where some of the strongest stomachs in the word live. We'll send Jeremy up in a plane and then purposefully let it go into a death spin. We'll also investigate one of the most dangerous sports in the world, high-speed powerboat racing. It kills one in every 10 drivers every year. In this exciting one-hour program, TLC will bring you the thrill of speed.

-Race car drivers are "slightly psychopathic, but not pathological"