The branches on the right disappear after the camera cuts away (I had to flip the image): <a href="http://i.imgur.com/a9qbm.png" rel="nofollow">http://i.imgur.com/a9qbm.png</a>
It looks like the GoPro and the remnants of the balloon helped it. The extra mass of the GroPro body allowed it to fall flat with the camera and ballon allowing it to spin on it's way down, like a maple seed. Also it looks like it landed on the aluminum side facing down with GroPro body hitting the ground first.<p>Still pretty cool though.
I would guess this was faked. Look at the video a couple seconds after it lands - seems like there is somebody walking right nearby. Also something sounds off about sending an object up into the upper atmosphere and it landing only 70 yards away.