How does Albert Camus use imagery in The Fall?

In Chapter One, the auditor is wearied by Clamence's monologue and rises to leave. Clamence, however, pursues him and insists that he show the other man to his hotel. During their walk, Clamence dredges up shockingly detailed and violent images, such as Nazi genocide and the disemboweling of a defenseless pacifist, using them as an explanation for any little hesitation his instincts toward fraternization might suffer.