spaceport bar, startling everyone, jolting even the solitary drinkers out of their private nightmares. Actually the violence hadn't quite reached that stage. But it was a safe bet that it would in another ten or twelve seconds. And when it did there was no chain or big double lock on Earth that could keep it from terminating in bloodshed. The tipoff was the way it started, as if a fuse had been lit that would blow the place apart. Just two voices for an instant, raised in anger, one ringing out like a pistol shot. But I knew that something was dangerously wrong the instant I caught sight of the two men who were doing the arguing. The one whose voice had made every glass on the long bar vibrate like a tuning fork was a blond giant, six-foot-four at least and built massive around the shoulders. His shirt was open at the throat and his chest was sweat-sheened and he had the kind of outsized ruggedness that made you feel it would have taken a heavy rock-crushing machine a full half hour to flatten him out. The other was of average height and only looked small by contrast. He was more than holding his own, however, standing up to the Viking character defiantly. His weather-beaten face was as tight as a drum, and his hair was standing straight up, as though a charge of high-voltage electricity had passed right through him. He just happened to have unusually bristly hair, I guess. But it gave him a very weird look indeed. I don't know why someone picked that critical moment to shout a warning, because everyone could see it was the kind of argument that couldn't be stopped by anything short of strong-armed intervention. Advice at that point could be just as dangerous as pouring kerosene on the fuse, to make it burn faster. But someone did yell out, at the top of his lungs. "Pipe down, you two! What do you think this is, a debating society?" It could have turned into that, all right, the deadliest kind of debating society, with the stoned contingent taking sides for no sane reason. It could have started off as a free-for-all and ended with five or six of the heaviest drinkers lying prone, with bashed-in skulls. The barkeep made a makeshift megaphone of his two hands and added to the confusion by shouting: "Get back in line or I'll have you run right out of here. I'll show you just how tough I can get. Every time something like this