So, I long ago noticed, as have many others I think, that descending too rapidly can cause flight instability. These days I descend fairly slow and try to give it a little directional momentum to keep it out of its own wake. Anyway, today I was flying the Phantom 2 Vision, descended just a bit, and it suddenly started dropping like a rock. I was about 30 feet off the ground, and despite my attempt to throttle up, it just kept falling until it got to the ground, at which time it finally got lift and softly 'bounced' off the grass. What happened? Was this being caught in its own wake? Maybe since it's heavier than the Phantom 1 it is more susceptible to descent problems? Or maybe a controller problem? Battery was fine, and I continued flying 10 minutes after bouncing off the grass. I do have a video of this event, though it's probably not too helpful. p.s. should I bother to update the RC firmware? Since I have to open it up, I have put that off. Thanks!