A few days ago I went to Phong Nha-Ke Bang national park, Vietnam in Hang en cave, third largest cave in the world. I brought my phantom with me and took a dronie. Not the smoothest one I made that's for sure, but I'm quiet proud of this one. My heart was beating quiet fast in my chest and my palms were sweaty 
http://youtu.be/KE8lTeCj7Gc

http://youtu.be/KE8lTeCj7Gc