Revealing mistake: When the needle is set in the pool of water in a stump to act as a compass the pool has been carved out with a chain saw very recently and clumps of the wrong moss set around the rim like it belonged there.
Revealing mistake: In the last scene, when Anthony Hopkins and Alec Baldwin are trying to kill the bear, they appear to have sharp wooden spears. As the camera angle changes you can notice that Hopkins is holding a green/brown training pole instead of a natural wood spear.
Chosen answer: Under extreme and dire circumstances, the body can produce excessive amounts of adrenalin, enabling a person to ignore pain and perform physical feats they would ordinarily be unable to do.
raywest ★