The scientists weren't finished with Jason quite yet. They attached a robotic arm where his right arm should have been. He would have full functionality out of it, just add efficient as his other arm but a bit more durable since it was metal. In that arm he had enough feeling to feel natural, except he couldn't feel pain our tickling sensations there. The metal on it was strong enough to deflect bullets. The boy was taken to medical, patched up, then dumped back in his cell unconscious.