You watched in horror as the thirst for vengeance got the better of Throin. Youf never admit it openly but you did care for him despite the resentment you showed eachother openly. Throin got himself up from the tree where the other dwarfs were hanging off the cliff and attempted to strike Azog who striked him multiple times before he was ever picked up by Azogs beast and knocked unconscious. An other ork got the order to behead hom. You had to act you had to steal time before the eagles came.