Anyone experience while flying 600-700' in the air and Phantom just hovering in space and not responding to any stick movement? I panicked for a sec and then just started toggling both mode switches. Finally gained back control but it was a long 10-15secs. I brought it down and checked my back light and all looked fine. I then flew it about 50' high and about 900' away just to check things and all was good. Shew I thought I was gonna be a victim of a fly away. I had it in GPS mode, it was a very overcast morning.