I'd like to share my experience with you guys. We've lost a P2V due to a very strange failure. I'm pretty experienced in flying drones. We were doing tracking shots of our boat on the amazon river, with the copter at about 50m high and reasonable forward speed. Copter was in GPS mode, I let it go away a little bit up to lost connection, no biggie, we turned back and it was promptly back. As I was bringing it back towards the boat, at about 10ft, it swerved violently and sunk immediately. Copter was calibrated, flying fantastic, no ESC false movement or anything like that, it just went straight in the water. Due to the presence of electric eels, I didn't jump in the water. Any idea ?