I went to fly a DD. I have flown scores of Drone Deploy missions. I started everything as usual. Waited for all of the check marks to clear, home point updated, and then took off. First thing I noticed is that it was going towards the back of the building away from what I thought was the starting point. I figured ok maybe it will start there instead. I kept looking at the screen and noticed it kept going out over the ocean in kind a zig zag pattern. It looked like it was maybe 200 feet out over the ocean and 300 feet from me. So not that far away. I immediately hit RTH and it said it was. I could no longer see it and nothing was moving on the screen. EVerything was frozen. I continued to hit RTH, but nothing. The last view was of the water with the camera facing down. WHAT THE HECK HAPPENED? We waited for it to RTH with a low battery. NOTHING,