Took the Phantom 2 up to about 400 feet. Hovering nicely, then all of the sudden it started drifting. Tried to bring it back but found I had zero control. Decided to shut down the remote, as I've had it return nicely to home 3 times before. All of the sudden it takes a dive at about a 45 degree angle and is now somewhere in a large area full of trees. Anyone have any idea what might have happened? Also, is there anywhere where I can buy just the Phantom 2 craft, without having to buy the remote and battery charger? Thinking I might buy a different product if I'm going to trust it to carry a $500.00 gimbal and a $500.00 gopro.