"I would not do this unless I had to", Gandalf answered as he got onto the horse's back again. "I have business that needs attending to, and it cannot wait. No matter what happens, stay on the path!", he reminded them, before riding away.

Saeril used her elven stealth to allow herself to walk more quiet, but the forest itself was eerily quiet. Something wasn't right, she knew. It didn't feel normal. She couldnt help but see Kili stride away from the group. That was when she remembered: the very air was heavy with illusion. It had no effect on the Elven folk, but she just found out that Kili nor his brother were immune. They began to walk slower, their speech began to slur, they were hallucinating and disoriented, and they began to feel light-headed but they forced themselves to keep going. 

Quickly, the she-elf had to prevent him from almost falling off the edge of the path by grabbing the back of his cloak, and turning him around. She was down to his level, and holding his face, trying to tell him that it wasn't real and that he was seeing things.