Kili did indeed stay close; he kept one arm over his godmother in a protective hug of sorts and his head rested against her shoulder. For a while, he could not sleep. The guilt wouldn't fade until the gash did.

Later that night, Kili was startled awake by Thorin's voice. "Wake up! Wake up!" 
The youngest started to push himself up as ordered, and he took notice of Bilbo's sword glowing blue. [i]What was that? [/i]Before Kili made it to his feet, the floor broke in and he, among others, fell right through.

The floor lead down a chute, one that everyone tumbled down, only to land roughly in a wooden box-like cage. The Company was met by a hoard of horrible creatures; Kili believed them small orcs, but Thorin cursed their name. "[i]Trolls[/i]!"

The trolls were vicious, and they were quick. Already they were stripping them of their weapons and forcefully dragging them along despite the fight the dwarves had put up. Kili had kicked one off of himself, only to be dragged by two in its place. There were so many, too many to have dealt with. 
Only Bilbo had hidden back unnoticed.