high cliffs and buildings and coming closer to being batman than most of us pushing the limits of human experience. and sadly, eventually he pushed too far. well-known base climber and jumper dean potter found dead on the ground in yosemite national park over the weekend after something went horribly wrong. our stephanie elam is following the story live. >> reporter: jake something he feared as a child, that he would fall to his death, but believe it or not it was that fear that actually drove him to take on the feats that he did. >> three, two, one -- see ya. >> reporter: from jumping off cliffs in wing suits to lielining, dean potter extreme sports legend and pioneer. potter died doing what he was known for. base jumping. leaping from fixed points instead of from an aircraft. baps stands for building antenna span and earth. in yosemite, base jumping is