Sportcoat’s actions are abrupt and shocking. Although Deems treats him poorly, Sportcoat’s response—if it can be read as a direct response—is, of course, way over the top. There are a few possibilities for why Sportcoat acts the way he does. First, he could just be going insane. Second, there is more that is motivating him than what is seen here. Or, third, it could be some combination of both.