"What kinds of creatures?" Kili looked back to Saeril as the rest of the company dismounted from their horses. Kili did the same, and he offered his godmother a hand even though he was so much shorter than she was. It was the thought that counted, anyway. "Were they like the stone giants?"

"Focus, Kili." Thorin knew that his nephew would ask dozens of questions, and now was not the time. Gandalf was leaving them once again.
“Come on. We must reach the mountain before the sun sets on Durin’s Day.” The woods were uninviting, and a broken, paved path lead them towards the darkness. Foliage and shrubbery crowded the travelers, and the trees seemed to reach the sky and block out the possibility that the sun was above them. "This is our one chance to find the hidden door."

It wasn't long before the company became hopelessly lost. "Is there no end to this accursed place?" Thorin searched for the path, but it was gone from view. Increasingly agitated, he and Dwalin both attempted to go in different directions, but they were lost. Hopelessly so. Some dwarves voiced their concerns, others merely mumbled to themselves.

Kili felt himself grow dizzy and confused, and when he looked towards where his brother should have been, he found Fili gone. "Fili?" Worried, Kili started to leave the group in order to find him, but all he'd seen was an illusion. Fili was further up ahead. 
The youngest was not the only one hallucinating: Bilbo saw himself walking backwards, and when his head snapped up, he saw himself in Dori's place. Something was terribly wrong here.