Serena pulled Bane to the side and grabbed Thorin and held them both as the bridge shook. When it was over Gandalf nodded and said "That will do...shall we get out of here then?" Serena nodded, looking at Thorin. She looked around then reached down and picked something off the ground. She looked around and said "Thorin, I think you dropped this?" She held up the key, the string having snapped in the chaos.