Is it possible to sky dive without a parachute and land safely? Let's assume an averaged sized man (1.8 meters height 80 kg) who's sky-diving from a 5000 m height.
Let's also assume he's using tight clothes and no parachute.
The idea is:
Is it possible for him to survive the fall if he tries to get the maximum velocity he can get by free falling and later, by positioning his body horizontally in a way that resembles a wing shape, get enough upwards impulsion so he can land safely?
EDIT: I was not looking for surviving stories that happened by chance. I was looking for the possibility of a technique that would allow someone (trained) to  land safely multiple times, not saying without a scratch but at least without broken bones, and without a special impact area.
 A: It already happened that people survive free falls, and is documented. The record, I think, is from a Flight attendant who was sucked out of an airplane in flight...
So, it seems that, under the perfect conditions, if you hit with the perfect angle, and the perfect surface, you just have a slight change to survive; not necessarily be intact, not still have all your limbs... just survive
There is also someone who flew and landed using a wingsuit (no parachute), and managed to land on a runway made of empty cardboard boxes. There's a video of that on youtube. That's not exactly what you asked for but I figured it would interest you anyway.
A: So you are asking if the aerodynamic lift can ever exceed the weight and thus slowing the fall. I think the flow around human body is going to stall at the angle of attack needed to get there. Basically the weight to surface area (Wing Load) is too high for controlled flight. This is the reason a wing suit is needed. It increases the surface area, lowering the above ratio and allowing steady flight at an angle of attack which sustains the flow and does not cause a stall condition.
You want the stall speed to be low enough for safe landing, and in our case the stall speed is approxiamtely equal to the free fall speed.
A: In case you are not aware of it, there is a "lunatic fringe" of free fliers, who are into humans flying without a hang glider.    They wear a special suit, that is like a flying fox, generally skin tight, but with a kite wing configuration going from their outstretched arms, along their body, and down the outside of the legs.
They jump out of planes, or base jump, and they achieve a flying or at least gliding speed, and they can fly along the ground, so long as it slopes downward.   To terminate, the "flight", they have to gain enough altitude over the ground , so they can pop a chute.    They aren't going terminal speed because of the "wings" but very fast anyway; 100 mph region. and the landings are hard.    Some have made many such flights honing the art; but the fatal crashes have been significant.   It is likely to develop just like base jumping has.
But your concept just won't fly, without some aerodynamic suit.
A: Nope the person will attain maximum velocity while striking the ground after he reaches the surface of earth. Thus no matter whatever body shape he makes he is not able to survive as he is not able to displace that amount of air equal to his own weight. 
Why don't you try thinking when you swim in water you displace the amount of liquid equal to your own weight thus you are able to swim forward backward or in any other direction you want to go. However in case of air you are not able to do so as the intermolecular space between the air particles is large while that for water is less and that for solid is the least thus you are able to walk on any solid surface easily(Neglecting frictional force).
So it is absolutely not possible to get your bones intact after hitting the ground with a great velocity. Luckily if any one manage to survive then it is nothing but either a miracle or act of god.
