DJI Phantom 2 Vision + randomly flipping without warning. Recently updated to phantom 2 vision assistant_3.6 with all items updated to most recent firmware as of the 4th Nov 2014. Anyone have a suggestion why it might of done this, nearly ended up in the drink. Have vision+ Utility Pro flight log if interested. Wind was only approx 17km. I have flown in strong wind previously without issue. Note I had pretty limited control of the device until the speed returned to normal (notice speed increase, once that returned back to acceptable limits I had normal flight control). Note the music is a bit loud, was a quick search on YouTube for something that contained the word Mayday. https://www.youtube.com/embed/RmEltRb-OzQ It hasn't done it since, have done multiple flights low to ground in fenced in hockey field (almost acts as a Faraday Cage limiting external interference sources). Have since flown upto 400m high without issue. I am suspecting weird pockets of wind / updraught that were following the river bed and those updraughts might of hit / clipped the side of the multi rotor causing it to flip the same direction each time. But after additional thoughts etc.