Saturday - Stuck

Lesson learned.  Do not calibrate a quadcopter underneath a tree!  While flying we lost signal and the quadcopter came automatically back to it's starting place.  Except it was not programmed to avoid any obstacles on its way.

So the wind blew and it fell.  Unfortunately, 10 cm next to a blanket that was supposed to catch it.  It still flies, but the camera got broken.  Hope it will not cost a lot to replace it.  :(