Couple days ago I was flying my phantom 2 in South Florida and I had a close call, and was wondering if anyone else had a similar issue. While flying in GPS mode I completely lost control as if it went into going home mode, then the phantom starting descending rapidly at 10-13 m/s and was looking as if it was about to flip. I switched from GPS to ATT and it eventually recovered. All my sticks were neutral pos., winds were 10 gusting to 15 mph, and I had perfect fpv signal. Heres video https://www.youtube.com/watch?v=SzpQZPBLUrU. I've felt sick ever since and would like to understand what happened. Lesson learned flying in urban/ crowded places.