He stopped. Detective Sergeant Fitzgerald swallowed carefully. "I don't question it," he said dizzily, "even if I don't believe it. Will you now tell me that what just happened was a psi something keepin' violent things from happening?" "That's it," agreed Brink. "The psi unit made the dryer-door fly off and knock a pistol out of a man's hand. If they'd dropped the idea of violence, that would have ended the matter. They didn't." "I accept it," said Fitzgerald. He gulped. "Because I saw it. A court wouldn't believe…