From a quad-copter drone. https://www.youtube.com/watch?v=p7Xgz7t5DkM
[video=youtube;p7Xgz7t5DkM]https://www.youtube.com/watch?v=p7Xgz7t5DkM[/video]
[video=youtube;p7Xgz7t5DkM]https://www.youtube.com/watch?v=p7Xgz7t5DkM[/video]