At Sequoia National Park, two hikers had a major stare down with a wild mountain lion and caught the encounter on tape.
The video shows the adult lion walk down a trail out of sight, a few moments later the hikers slowly come round a turn to see it looking down at them from a perch feet away.
Sam Vonderheide and Brian McKinney were on the first day of an 11-day hike through the Central California mountains when they met the lion.
"For a good 20 to 25 minutes, we tried to scare it, to make noise. It just looked at us."
They said they decided to back away and turn back on the trail to set up their camp for the night, never seeing the cat again.
Wildlife biologist Daniel Gammons said the hikers did the right thing by staying calm.
"The big thing these visitors did right was that they didn't panic and run. Probably the most important message to get out to visitors is not to act like prey if they encounter a mountain lion."