I am in pain. My back slipped out of place last Wednesday while bending down to pick up a piece of paper. I wish I could say it was something spectacular that caused the sacrum to shift, but it was only a simple movement. On Friday my massage therapist was able to put things back in place. Now I must wait for the damage to heal. I can stand, walk and lie down, but not sit. (sounds like a puppy in training!). This has happened before. It usually takes about 2 weeks for things to settle down.