It was almost a reflex which brought his arm back and sent the wrench hurtling across the few yards between. Before it had struck, Bo's feet lashed against the pit edge, and the kick arced him toward Lundgard. Spacemen have to be good at throwing things. The wrench hit the lifted rifle in a soundless shiver of metal, tore it loose from an insecure gauntleted grasp and sent it spinning into shadow. Lundgard yelled, spun on his heel, and dove after it. Then the flying body of Bo Jonsson struck him. Even in low-gee, matter has all its inertia. The impact rang and boomed within their armor, they swayed and fell to the ground, locking arms and hammering futilely at helmets. Rolling over, Bo got on top, his hands closed on Lundgard's throat--where the throat should have been, but plastic and alloy held fast; instinct had betrayed him. Lundgard snarled, doubled his legs and kicked. Bo was sent staggering back. Lundgard crawled erect and turned to look for the rifle. Bo couldn't see it either in the near-solid blackness where no light fell, but his wrench lay as a dark gleam. He sprang for that, closed a hand on it, bounced up, and rushed at Lundgard. A swing shocked his own muscles with its force, and Lundgard lurched. Bo moved in on him. Lundgard reached into his tool-tube and drew out his own wrench. He circled, his panting hoarse in Bo's earphones. "This ... is the way ... it was supposed to be," said Bo. He jumped in, his weapon whirling down to shiver again on the other helmet. Lundgard shook a dazed head and countered. The impact roared and echoed in Bo's helmet, on into his skull. He smashed heavily. Lundgard's lifted wrench parried the blow, it slid off. Like a fencer, Lundgard snaked his shaft in and the reverberations were deafening. Bo braced himself and smote with all his power. The hit sang back through iron and alloy, into his own bones. Lundgard staggered a little, hunched himself and struck in return. They stood with feet braced apart, trading fury, a metal rain on shivering plastic. The stuff was almost unbreakable, but not quite, not for long when such violence dinned on it. Bo felt a lifting wild glee, something savage he had never known before leaped up in him and he bellowed. He was stronger, he could hit harder. Lundgard's helmet would break first! The Humanist retreated, using his wrench like a sword, stopping the force of blows without trying to deal more of his own. His left hand fumbled at his side. Bo hardly noticed. He was pushing in, hewing, hewing. Again the shrunken sun rose, to flash hard light off his club. Lundgard grinned, his face barely visible as highlight and shadow behind the plastic. His raised tool turned one hit, it slipped along his arm to rap his flank. Bo twisted his arm around, beat the other wrench aside for a moment, and landed a crack like a thunderbolt.