If that doesn't happen, there's a period of suspiciousness and secretiveness strongly suggestive of paranoia. Then there's a craving for unusual food. When it becomes uncontrollable, the patient is mad!" The ground cars sped toward the city. A second group of vehicles appeared, waiting. As the four-car caravan swept up to them, one swung in front of the car in which Calhoun and Murgatroyd rode.