"Grab it!" shrieked one troll while the other exclaimed back towards his counterparts.
"It's too quick!" somehow in their unco-ordinated blundering, two of the trolls had managed to herd Bilbo towards the third and corner the hobbit there, allowing the third troll to seize the hobbit by the ankle.
"What are you then," he demanded in his slow, drawling voice, "an oversized squirrel?!"