based on the Blancolirio explanation, it would have been held in place by the pressure differential, except that on this flight it got jostled just right at a l

based on the Blancolirio explanation, it would have been held in place by the pressure differential, except that on this flight it got jostled just right at a low enough altitude. What seems odd is the springs that assist opening an emergency exit are left in place. Might not have made a difference.