Discusses the constellation of sinistrosis, defined as a psychopathology caused by an accident at work indemnifiable by workman's compensation, a concept surrounded by ambiguities and credibility problems. It may involve just an attitude of chronic complaining and delusions of revenge or escalate into a hypochondriac neurosis, even into a delirious state with obsessions of revenge. Arab immigrants in France may incur further complications because of their uprooting and alienation. Their body may become the locus of psychologically, socially, and culturally determined pathologies. The author exemplifies his theme with a clinical vignette. He outlines the difficulties the psychologist encounters in diagnosing the elusive pathology of a subject automatically suspect of overestimating the original accident and overplaying its consequences.