Took my second phantom 3 out tonight at the art museum in Philly. It's my 56 flight. Took off as usual and I started taking it straight up right away. Then all of a sudden it decided to go left and away from me straight for the museums wall. I almost **** my pants and kept the left joystick up in hope to clear the building and I swear I made it by no more than a foot. Then it loses signal, and not just loses signal I get no info on the phnatom at all, like it's turned off. So I think it must have crashed into the roof a little further up cause it's a huge building. Just for the **** of it I started walking around the building in the hopes that maybe it was just hovering somewhere. And then I got the signal back and the craft was more than half a mile away. So I hit return home. When it got closer I saw it going back but in circles. WTF?! So I stop return home and want to guide it back myself. It works fine for bit but then it starts spinning in a small circle. Then I hit return home and it starts moving normally like it should. Then again I take over and bring it down and land it. I have no idea what is happening with it. You know whenever I was reading posts of crazy things happening to phantoms I thought to myself it's just dumb pilots error. But now that it happened to me I'm starting to get worried about how well these things are made. Anyone has any idea what the hell could cause such behavior?