The crash of his powerful voice almost shattered the ear drums and hardened buccaneers started and blenched. Nothing is more stunning or terrible than the sight of a man of icy nerves and iron control suddenly losing that control and flaming into a full withering blast of murderous fury. For a fleeting instant as he thundered those words, Kane was a fearful picture of primitive, relentless, and incarnate passion. Then the storm passed instantly and he was his icy self again--cold as chill steel, calm and deadly as a cobra.
--Robert E. Howard, "The Blue Flame of Vengeance"--