Theres a Cyberman coming at her, looking forward to eating her brain. Its killed people before her eyes, has proved so dangerous planets are destroyed just to kill one, and has just survived electrocution and gun blasts. But all Claras got is a mace, so a mace she swings. It doesnt work, but stillshe attacked a Cyberman with a mace! Who does that, why would anyone do that! When stuck with inferior equipment, be it a punishment platoon or a Doctor tied to a chair, Clara compartmentalized her reaction to her kids' comas, focused, and radiated confidence. She did a really good job of not letting anyone see how much trouble they were all in. Still, a mace! Its the maddest act of Doctor Who violence since Amy clubbed Eleven with a cricket bat.