Zane Wach, 14, left, began hallucinating before stepping off a 120-foot cliff while hiking with his father, seen right.

Zane Wach, 14, was exhibiting symptoms of altitude sickness before falling from a cliff on California's Mount Whitney.

Ryan Wach said his son Zane Wach, 14, experienced altitude sickness while climbing California's Mount Whitney and seemed to ...

A California teen who walked off a cliff while experiencing altitude-related hallucinations on the tallest mountain in the lower 48 states has begun a slow recovery but remains in a ...

The health update comes after the 14-year-old walked off the edge of Mount Whitney while hoking with his father after ...

A 14-year-old California boy walked off a 120-foot cliff in front of his horrified father — telling him he saw “snowmen and ...

A devastating hiking accident on Mount Whitney has left a 14-year-old California boy clinging to life after altitude-induced ...

The 14-year-old began experiencing altitude sickness as he and his father were hiking Mount Whitney in Northern California ...

Zane Wach, 14, who hallucinated before walking off a 120-foot cliff on Mt. Whitney, is now off a ventilator and making slow ...