So admittedly I am a rookie. I have had my copter for about 8 months but have flown only about 20 times. Yesterday after capturing some nice lake footage I thought I would go over to this amphitheater and to a fly through a few times. I thought I had battery enough and even looked at the battery showing 2 bars. I made my passes getting the footage I wanted and on the last pass it happened, YEP.... low batt return to home. I was under the structure and it took off. Hit the roof and then the ground busting 3 prop guards but also damaging my camera. Not too sure how to turn that feature off yet but after I fix things that will be on the agenda before lifting off on an indoor/under cover flights.