In northern Alaska once some years ago man was left by an enemy to die in the freezing cold wilderness with only two husky dogs and the clothes on his back. He took a shit in the snow and molded it into the shape of a crude knife and allowed it to freeze solid in the snow. He then used his new knife to kill one of the dogs. He skinned it and used the fur to wrap around him to keep him warm. He then made a crude sled out of the dead dog's rib-cage and tied it to the living dog with sinews and tendons and strips of muscle from the corpse. He used his new dog-sled to transport him to safety.

With enough willpower, anything is possible.