It was a boxlike machine with a pistol grip on the side. Jason clutched the grip and rested his elbow on a metal loop. Brucco fixed pointers that touched his arm, then copied the results from the meters. Reading the figures from his list he selected various components from bins and quickly assembled a power holster and gun. With the holster strapped to his forearm and the gun in his hand, Jason noticed for the first time they were connected by a flexible cable. The gun fitted his hand perfectly. "This is the secret of the power holster," Brucco said, tapping the flexible cable. "It is perfectly loose while you are using the weapon. But when you want it returned to the holster--" Brucco made an adjustment and the cable became a stiff rod that whipped the gun from Jason's hand and suspended it in midair. "Then the return." The rod-cable whirred and snapped the gun back into the holster. "The drawing action is the opposite of this, of course." "A great gadget," Jason said, "but how _do_ I draw? Do I whistle or something for the gun to pop out?" "No, it is not sonic control," Brucco answered with a sober face. "It is much more precise than that. Here, take your left hand and grasp an imaginary gun butt. Tense your trigger finger. Do you notice the pattern of the tendons in the wrist? Sensitive actuators touch the tendons in your right wrist. They ignore all patterns except the one that says _hand ready to receive gun_. After a time the mechanism becomes completely automatic. When you want the gun--it is in your hand. When you don't--it is in the holster." Jason made grasping motions with his right hand, crooked his index finger. There was a sudden, smashing pain against his hand and a loud roar. The gun was in his hand--half the fingers were numb--and smoke curled up from the barrel. "Of course there are only blank charges in the gun until you learn control. Guns are _always_ loaded. There is no safety. Notice the lack of a trigger guard. That enables you to bend your trigger finger a slight bit more when drawing so the gun will fire the instant it touches your hand." It was without a doubt the most murderous weapon Jason had ever handled, as well as being the hardest to manage. Working against the muscle-burning ache of high gravity, he fought to control the devilish device. It had an infuriating way of vanishing into the holster just as he was about to pull the trigger. Even worse was the tendency to leap out before he was quite ready. The gun went to the position where his hand should be. If the fingers weren't correctly placed, they were crashed aside. Jason only stopped the practice when his entire hand was one livid bruise.