"So my special kind of luck," said Brink, "comes from antiviolence psi fields, set up in psi units of suitable material. They don't use up energy any more than a magnet does. But they transfer it, like a magnet does. My brother-in-law thought he had to lose his business because Big Jake threatened violent things. I offered to take it over and protect it--with psi units. So far, I have. When four hoods intended to shoot up the place and moved to do it, they were warned. Psi 'eddy currents' made their eyelids twitch. They went ahead. Probability changed. Quite unlikely things became more likely than not. They were obstinate about it, and what they intended became perhaps the only thing in the world that simply couldn't happen. So they crashed into a telephone pole. That wasn't violence. That was accident." The detective blinked, and then nodded, somehow painfully. "I see," he said uncertainly. * * * * * "Somebody set a bomb in my delivery truck," added Brink. "I'm sure his eyelids twitched, but he didn't stop. So probability changed. The explosion of that bomb in my truck became the most unlikely of all possible things. In fact, it became impossible. So some electric connection went bad, and it didn't go off. Again, when Jacaro intended to plant a time fire-bomb to set the plant on fire--why--his eyelids must have twitched but he didn't give up the intention. So the psi unit naturally made the burning of the plant impossible. For it to be impossible, the fire-bomb had to go off where it would do next to no harm. Jacaro lost his pants." 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 it, though, Mr. Brink!" "Well?" "I've been tryin' for months," said Fitzgerald in sudden desperation, "to find a way to stop what Big Jake's doin'. But he's tricky. He's organized. He's got smart lawyers. Mr. Brink, if the cops could use what you've got--" Then he stopped. "It'd never be authorized," he said bitterly. "They'd never let a cop try it." "No," agreed Brink. "Until it's believed in it can only be used privately, for private purposes. Like I've used it. Or Hm-m-m. Do you fish, or bowl, or play golf, sergeant? I could give you a psi unit that'd help you quite a bit in such a private purpose." Detective Sergeant Fitzgerald shook his head.