The robot felt nothing, for she had a mission to accomplish.<br/>She slapped Cassie with the back of one hand. "I said no talking." The voice was without emotion again.<br/><br/>The droid pulled a cylinder from the case and held it to Cassie's carteurized shoulder socket. The most mind-bending, searing pain imaginable followed as the edge of the device not only fused itself with her shoulder but invaded the musculature around it as well, turning it into the same artificial substrata the other one did. Only this time the process wasn't done under general anesthesia.  Once it was complete the cylinder cracked open and unfolded itself, deploying into a new artificial arm for the girl.