 Why is it important to watch the ones who don't become physically ill during the conditioning process?
"No specific destination," supplied the man as he punched a key on a small instrument, "Air-lock ahead and to your right. "Place your clothing in the receptacle provided and assume a stationary position on the raised podium in the center of the lock." Short of Gravitational conditioning, there is nothing to stop you from going to Terra." Your body is conditioned to a normal state of free fall, or at best to a state of acceleration." "You were ill, couldn't keep your balance, felt dizzy. It helps suppress certain physiological reactions to an entirely new set of conditions. They play an important part in our awareness of balance. Without gravity they act up for a time, then gradually lose function. They were incredibly varied, even those that supported life. He had been on Einstein IV, the planet of eight moons, and had felt the pulse of all eight of the satellites at once that no PON could completely nullify. But even if he could accept the psychologist's authority for the cumulative effect of a gravity system, he could not understand the unspoken warning he felt underlying all that the man said. On the eighth day, two attendants, who showed the effects of massive doses of PON to protect themselves from the centrifugal force, had to carry a man out of the tank. Many others asked to be removed, begged to be allowed to withdraw their resignations. "How ... how do they know when you ought ... to come out?" "Blood pressure. "Can't they ... drop it down continuously?" "How ... many times ... do they drop it?" He felt the cot slowly rise longitudinally, felt himself upside down, then the snap of turning right side up once more—and he knew that neither he nor the cot had moved so much as an inch. Two white-clad figures, ridiculously out of proportion, hovered wraithlike over him. Either that or they had begun to produce ultra-sonic waves. The huge headquarters base centrifuge aboard the man-made satellite had gradually caused their bodies to respond once more to a single source of pull. They were now ready to become inhabitants of planets again, instead of free-falling ships. On the eighteenth day, automatic machinery freed them from their imprisoning cots. Then they again began taking paraoxylnebutal in preparation for the free-fall flight to Terra. Only one of the score of men in the centrifuge tank remained voluntarily in his cot. "Not to Chociante, if that's what you mean.
 Their bodies' familiarity with gravity naturally makes them suspicious
 They could be tapped as leaders for Freedomite missions  It is a sign that they are deviant extraterrestrials  Their bodies' familiarity with gravity naturally makes them suspicious  Their bodies may naturally produce paraoxynebutal