This is a picture of the anterior pelvic region and the viewer will see that the femoral acetabular position is different on the right and left side reflecting the Left AIC orientation of the pelvis and the accompanying compensation that’s so often seen through the femur in the left acetabulum. This picture depicts a femur that is externally oriented and the femoral acetabular activity is, therefore, unstable because of the high compressive forces being distributed through the anterior superior labrum of the capsule itself and the accommodation of the femoral head being moved forwardly as the iliofemoral and pubefemoral ligaments are being lengthened. This “capricious” state is impulsive, unpredictable and unstable.  It’s a very difficult position to manage, control, regulate and guide. I like using this word to describe left acetabular femoral joint activity when the acetabulum is in a position that places demands on the femur that are not appropriate for normal kinetic or kinematic function. This is a “capricious” state and a joint that is going through “capricious” activity in a manner that is unpredictable from individual to individual.