In atmosphere you might have more drag (and some maneuverability) as a skydiver than as a streamlined plane. Quite a few people have survived falling out of airplanes over the years, without working parachutes. It\'s obviously not a very safe way to land, but it is indeed possible. Iirc, the soviets once threw several hundred people out of aircraft at high altitude without chutes, over deep freshly- fallen soft snow. To their surprise, some 40 percent were more or less able to walk after impact. Jumping outside of the atmoshphere, though, might be less successful :-)
