this is why people should not adventure alone, bad decision making... and no help in getting out of predicaments, like 4x4ing on mountain bike trails (thanks Mike!)

https://www.thedrive.com/news/36651/theres-a-jeep-wrangler-dangling-off-a-cliff-in-california-after-some-fool-drove-up-a-bike-trail

follow up, the Jeep owner was interviewed, 

the way he tells it, his brother was behind the wheel, 

"So, [my brother] had never driven a Jeep," Ricky Barba explained. "He was like 'Let me drive your Jeep' because I've been trying to get him to buy one, so that's how it started."

It was really getting dark, and a series of wrong turns landed them on one narrow trail after another.

Barba and his brother initially made it across that knife-edged ridge in the now-famous photo. But when they got to the other side, they couldn't see over the crest and decided to try and back up.

https://www.thedrive.com/news/36743/the-owner-of-that-famously-stuck-jeep-wrangler-finally-speaks