x-ray of the week

The story is thus: Motorcycle accident...six months ago.  He still can't walk so he came to the doctor.  To start, take a quick look at these normal knee x-rays:

This is his x-ray:

can you spot the difference?

totally dislocated

in diagram form (from crashingpatient.com) 

Normally, a posterior knee dislocation would be a surgical emergency. But, after six months, it was hard to be in a hurry to do anything  It might have to wait for the orthopedic surgeon...and even then there may not be much we can do.