There are two things that I can think of about this movie that I found far fetched. First the cordage they got to build those crazy traps. I know you can make cordage out of spruce tree roots but to make the amount of rope they used in the movie would take so much time. And of course when he makes Bart the bear impales itself on his wooden spear ("same principle as the deadfall") but it's a nice idea anyway. But then it's when they manage to make fur coats from the bear in such a small time span, I'm not a hunter nor an expert in fur management but I'd guess they would need some time to tan the skin or something... BTW Bart the bear was a Kodiak bear, they are known for being less aggressive then their cousins, the Grizzly bears though.

Frankie