I sent my drone on a Pix4D POI (circular orbit) survey on a friends farm. Just after starting to circle we decided the radius was too large and I aborted the flight by hitting the RTH button on my rc. The screen showed " Descending", even after repeated stabs at the RTH button. By now I had lost sight of the drone and headed to the spot last shown in the orbit on my Ipad and found it crashed below a tree. I could have aborted the flight on the program, but thought the rc would always override any other program I might be flying on. Any comments out there?