I don't see how his leg could bend and flop the way it did without some broken bones.
Knee dislocation could explain that -- it was flopping around at the knee.
Good news for Lattimore. A bad injury, but not career ending. Hopefully he will take off next year and be 100% in 2014. I'd hate to see him come back next year at less than 100%, like he tried to do this year.