I want to get a shot that goes from 400 feet in the air then goes down under water about 10 feet. An idea I have is to attach a gopro to a string hanging below the Phantom about 20 feet or so then I can achieve this theoretically. The Phantom would "dunk" the gopro into the water and be flying with the gopro submerged below it. Thoughts? Would the Phantom handle this do you think?