Search the forum but can't find a similar problem. Been flying great for years. Several upgrades. Today was up for about a minute. 50 - 60 feet off the ground. Hovering smoothly.. heard 2 or 3 beeps, phantom flips to the right ... straight down hard to the ground. Bent an arm. Destroyed a gimbal and camera. No idea what happened all controls set to where they always are. Anyone have an idea of where to start troubleshooting? All the motors will still spin up but the one that hit the ground hard seems a little sluggish and the light is out. Of course I figure that's s result of the impact. The beeps and sudden flip has me puzzled. Thanks in advance.