Oh, you underestimate how much damage a pair of sufficiently malicious humans can inflict, especially if we assume that they are the last remaining members of a

Oh, you underestimate how much damage a pair of sufficiently malicious humans can inflict, especially if we assume that they are the last remaining members of a once highly technological civilization rather than ancient cavemen. So the cave you've been hiding in happens to be filled with long-forgotten Soviet nuclear material, which you think might help you get rid of the hungry pack of wolves outside...