Wingsuit pilots are a different breed. At any given moment during a flight, they can be a few feet and one strong gust of wind away from death.
Brian Drake and Ellen Brennan and Ludovic Woerth headed to the top of ENSA Couloir to fly down the gully. Brian can be seen in the footage as he pushes down the mountain while getting insanely close o the ground.
As close as he is, there have definitely been close. Just ask Jeb Corliss who actually crashed into the face of a mountain in his wingsuit and miraculosly survived.