You guys that are saying he's fake, either you didn't watch the show, or didn't read the disclaimers.
"Bear and crew receive aides in life threatening situations as required by law, etc..."
And
"Sometimes, situations are presented to Bear so he can demonstrate survival techniques..."
With that said, a lot of the things he did just to show you the most extreme scenarios, where you may need to resort to extreme measures, to SURVIVE. Don't forget that. He didn't have to slide down a cliff, but he explains why you may have to, and why sometimes it's necessary. And then he did it to show you just in case you have to, one of these days, and hope you remember the techniques...
There's just no pleasing some of you. I hope that when things are tough for you, you can just run to McD and buy a combo meal. Screw all that survival crap, amirite?