Thorin turned his head to look at Serena and nodded. "We must find shelter!" he hollered back to the others.
"[i]LOOKOUT![/i]" came a shout from one of the dwarves behind as a large chunk of rock smashed into the side of the mountain just above the company's heads. 
"Well bless me!" exclaimed Bofur in shock. "The legends are true! Giants, Stone Giants!"