Ratchet yanks hard at his wrist and manages to duck Tarn's elbow, even if he can't pull away--the blow still clips his helm, denting it and sending sparks along his vision. An awful, grinding terror wells in him as Tarn's grip tightens so close to the delicate mechanisms connecting his hand to his wrist but he forced himself to focus, stepping into Tarn's space instead of away and bringing his other arm up to aim a smaller scalpel across Tarn's throat, going for his vocalizer.