I wonder how injuries in the real world correlate with injuries in Borderland. We saw that the girl that had to cut her leg off actually had a roof fall on her in the real world. So which came first, the the roof falling cause the injury in Borderland? (then the girl would have no control over losing a leg no matter how hard she tried) Or maybe losing a leg in Borderland caused the roof to fall on her?
Heres my hypothesis: since what you do in the borderworld dictates whether you live or die, i think what you do in borderworld causes what happens in the real world. So cutting off her leg led to a roof falling on her.
Following the same logic: is Usagi still a virgin in the real world? Could a girl suddenly find herself pregnant in the real world after having sx in Borderlands?