re: How Did They Reduce Tua’s Hip Dislocation At The Stadium?

With a posterior acetabular fracture the joint is unstable and would go in and out relatively easily. A dislocation without a fracture is much more difficult to reduce.
From what I could see on the TV, his hip joint didn’t not appear to be dislocated. The femur would be internally rotated if it was dislocated posteriorly, and that did not appear to be the case on the field. But, depending on how bad the acetabular fracture was, it could have been dislocated posteriorly (thru the acetabulum) and not had the internal rotation of the femur...which is likely the case.