"To slow your descent, emulate a sky diver. Spread your arms and legs, present your chest to the ground, and arch your back and head upward."<p>You will fall slightly (5MPH-ish) slower if you instead arch your back and arms in the opposite way, as if attempting to hug a large beachball.  This position is slightly less stable though, so you risk flailing around and increasing your speed.<p>What the article did not discuss was any attempt at horizontal movement as a way of plummeting into something safer than a parking lot.