when you're falling out of a maneuver and totally disoriented, for example sliding tail first and inverted at 45 degrees, having the reflexes to push your nose back over the top or level it out and put in negative collective can make the difference between saving it or wadding it up. it's easy to say "fly the disc" but the disc only responds relative to something that's fixed. the ground is fixed but that does you no good if you relate to it when you're inverted. the pod and boom are always fixed to the rotor disc no matter what your orientation is.