Kili was patrolling the mountain, but as always he was fooling around with his brother Fili.

The older speaks up, "Kili be careful! Slow down you fool." Fili tries to tell Kili to pay attention, but Kili keeps running around, recklessly chasing a rabbit.

Then Fili's warning proves to have been needed as the dwarf bumps into you, sending both Kili and you crashing to the ground.