This patient's hypochondriacal fantasies were a displacement to the head of his castration fears, which involved not only the penis but also the testicles. His night terrors were related to nightmares in which he failed to move his bowels and was persecuted by a man or a stone. The patient believed that his nightmares were caused by 'the flatus in my blood'; his mother, he supposed, prevented his expelling this flatus.