Cusk . . . was aware that other people did not suffer from phobic anxiety about attacks, which combined with the other terms ruminative obsession, hyperhydrosis and parasympathetic nervous symptom arousal loop in a selfdiagnosis he had arrived at through scores of hours of covert research – he had even enrolled in psychology courses he had no interest in, in order to create a plausible cover for the research . . . and an awareness of his unique anxiety was one of twenty-two identified factors that could prime him for an attack, though not one of the really super-drive factors.