This drone follows you down the trail after you toss it up in the air
 

Aerial footage is a nice way to capture those action sports endeavors, and it's even better if you can fit the gear in your backpack. Lily ticks those boxes, and all you have to do to launch it is toss it up in the air. Once airborne, the camera UAV ...

http://www.engadget.com/2015/05/12/l...=rss_truncated