Eventually, he and another hiker recognized that the dirty, weak figure was a man caught in a hole in between two boulders. The man called himself Paul.
"He said, 'I need water, please don't leave me.' So I gave him water from my backpack and in a minute he said, 'You got more?' So I give more water," Llamas told KABC-TV.
"He said he'd been there between four and six days with no food," Llamas said.
Rescuers were called and pulled him up from the Dumpster-sized rocks in about 90 minutes, Vanderhorst said.
The man seems unclear about how long he'd been trapped, Vanderhorst said.
"He's claiming up to five nights but also said he came up Sunday," which would be a single day, the captain said.
"It looked like he slipped and fell down between two boulders, almost like a funnel into a hole," he said.
The man's shoes remained in the hole and his pants came off during the rescue, Vanderhorst said.
The pants were later retrieved. Llamas told KTTV-TV that he went back up the mountain on Tuesday and retrieved the red-laced, dirt-scuffed white sneakers in order to return them.
He also said Mole, a year-old brindled shepherd-chow mix, has become a celebrity.
"I went for a walk today," Llamas said. "The walk was OK, but everybody stopped me just to pet Mole. They don't care about me, they care about Mole.
"Somebody give him a medal up there on the mountain. He's a hero right now."