Kili shook his head slightly but before he could explain that his brother had gone back for help, the other dwarves all leapt out from behind the trees at Kili's back and charged straight at the trolls, shouting out dwarvish war cries and fiercely swinging their weapons at the beasts.

At first it looked like the dwarves might have had the upper hand, but unfortunately Bilbo managed to once again get re-captured by the trolls. While two of them each held the hobbit by a leg and an arm, the third shouted to the dwarves savagely. 
"Lay down your arms, or we'll rip his off!"