Hi Everyone It's a pity my first post here is a Crash Investigation! But I'd love to know what I did wrong! Since I had to travel with my Inspire RAW to another city for a film shoot, I decided to fly the drone at home (outside of course) to run down the batteries to safe levels. Since I was flying, might as well get some practice time in on VR Mode, because this shoot would be the first time I'd be flying FPV on a professional shoot. Everything goes fine, it's all working like a dream. I have Gimbal head-tracking on and Aircraft Head-tracking off. And I'm essentially hovering, testing out the range of movement on the gimbal with head-tracking. On the RC, only my left thumb is operational, going up and down on altitude. My right thumb is OFF the stick. Suddenly, I HEAR the aircraft moving laterally across. I rip off the VR and look up to see that my Inspire 1 with the Zenmuse X5R mounted on it, is ACCELERATING, straight towards a building. I know the dangers of flying near a building, I have flown in this very spot many times before. It's airspace I'm intimately familiar with - being right outside my home - and I have never had problems here, except one time I had a near crash when GPS signal was suddenly lost during a reasonably stiff breeze and I barely avoided a crash by pulling off a pretty hard landing. This was when I'd just got the Inspire - months ago. But I was less used to FPV, which is why I was being extremely careful, keeping my right thumb totally inactive and merely hovering, ascending and descending, testing out the gimbal. And yet, somehow, it accelerated. I'd really want to know what happened. A little context, just before this flight, upgraded both aircraft and RC firmware (FW_V01.09.01.30) - successfully. Immediately after that, I had a bit of trouble with magnetic interference at a spot I've never had any. Compass failed calibration twice. Moved to a different location, recalibrated. Worked fine. That's where I flew. And it all came crashing down. The aircraft flew into the building, and fell straight down. The basic airframe seems fine, that is to say, unbroken. It's certainly bent somehow, something has twisted somewhere, and I'm hoping it's a joint, rather than a beam! The camera, again, the heart of the camera - and its lens. they seem fine. The ND Filter is cracked. But the gimbal is in pieces. So now I'm praying that the damage is recoverable, and not totally unaffordable. But more importantly, why? Why did it crash? Here's my HealthyDrones Share - HealthyDrones.com - Innovative flight data analysis that matters DroneLogBook gave me better info when I uploaded the same logs. Turns out it was hovering fine, and then suddenly, turned and accelerated straight towards the building, going from 1.2 m/s to 2.47 m/s in a matter of 8 seconds. In a straight line! Unless I'm reading it wrong, the aircraft lost neither GPS nor Compass during this flight. Does anyone know what I did wrong?