tonight, she's sharing her harrowing story. here is miguel almaguer. >> reporter: the cliffside rescue unfolded in the shadow of el capitan emily harrington surviving a four-story fall off the mountain battered and bruised, but incredibly escaping a serious injury >> i hit a few things on the way down, but the rope caught me my gear caught me. >> reporter: a climbing champion whose feat includes summiting everest, she set out to climb one of the most challenging routes on el cap in a single day. she was scaling the 3600 foot wall with alex honnold, who made history during his free solo using no rope or harness to scale the yosemite mountain. after harrington's fall in freezing temperatures, he stabilized her spine before