The chapter begins with a description of Crooks' room. Though eventually said to be "swept and fairly neat" everything in it is disheveled. The blankets are described as "flung" over the straw. This word choice shows an unkempt feel. All the tools, bottles of medicines and "the split collar with the horsehair sticking out." add to this mood of disorder.
Another disturbance is with Lennie visiting with Crooks. Though the unschooled Lennie sees nothing wrong, the all too aware of racial inequities Crooks is suspicious at first of Lennie's awkward friendlyness.
Later, when Crooks suggests to Lennie that George might not return, Lennie misunderstands him, and the reader, as well as, Crooks see the first flash of the danger lurking behind Lennie's innocent countenance.
"Suddenly Lennie's eyes centered and grew quiet, and mad. He stood up and walked dangerously toward Crooks. 'Who hurt George?' he demanded.
Crooks saw the danger as it approached him. He edged back on his bunk to get out of the way..."
Finally, one statement made in reference to "disturbance" is made when Crooks flat out says to Lennie that he is "nuts" and "crazy as a wedge" when Lennie is talking about the rabbits.