"What about that little knife of yours?" Gloin suggested, looking across at Bilbo. "That'd be small enough wouldn't it?"

The twins exchanged glances and smirked at Bane. 
"Could be that he likes you." Kili started.
"Or he could just be waiting to see if you can be more useful." Fili shrugged. "Sometimes it's even hard for us to tell. He's usually in a pretty bad mood permanently."