My DH who is an engineer immediately said he bet it was a cable , he then said that was a maintenance issue and inexcusable!
As far as re-attaching I wouldn't be too hopeful. It sounds like a crushing, tearing type injury,the hardest for reattachment because of all the blood vessel crushing and injury and knowing that ride the feet may have fallen a long way and again been crushed and damaged. Thank God it was her feet further up the legs would have been harder to rehab and also more easily fatal. Or Heaven forbid if it had wrapped around her neck. Lets hope it happened quickly, poor baby.