WING SUIT FLYING

 I wonder how the first wing suit was tested?  Is the tester still alive? How does one navigate and control the flight path? Is there a weight limit? I would pass , not even for a billion dollars.

 Is the helmet really neccessary?  When one crashes , does the helmet really protect the head from being smashed into pieces? Also, when one crashes into a tree , even the helmet protect the skull, the force will break the neck.

 I guess one lands using a parachute.