Bilbo looked to Gandalf curiously, surprised that he could guess so easily. "Y-yes. But bigger, much bigger.” 
Bofur was liking this less and less. “I say we double back.” There were murmurs of agreement, but Thorin spoke up.
“And be run down by a pack of Orcs.” They didn't have many options here, though Gandalf did mention a house where they may take refuge.
“Whose house? Are they friend or foe?” Thorin questioned, and then suddenly a loud roar ripped through the clearing. "[i]Run![/i]"