Friend (SF) & I were leaving Goodwill in Charlotte - I looked up at sky and mentioned how beautiful the clouds and sky looked. I saw what at first looked like a black bird flying just below the clouds, but at what I estimated to be at least 2 miles high. As I watched a few seconds, I called my friend's name to see what I was seeing. I said "That's not a bird." My friend said "It's not flapping its wings." We watched as it swirled around, doing a loop and flying like a bird would, but never changing its triangle shape. It reversed course to the east, changed to a circle, flew around about a short while, then took off to the north at a fast clip... way too fast for a bird. Friend thought it might be a drone. I said drones don't change shape or do loops... they fly a straight path. He admitted that it was odd.This is my third UFO sighting. First time - smoking in parking lot at work, and saw a white tic-tac shaped object fly a straight path into the only cloud in the sky and never come out the other side. Second time - driving on Tryon St. near 485, pulled over to read written directions. Looked at row of houses about 200 yds. away to see what looked like a thick, black, domino-shaped object very slowly drifting over the houses. Saw longest side of object from my perspective. It was wider than the house it was floating over. Behind it, I saw a plane taking off from Charlotte-Douglas airport. Once I arrived at party, told people there, who laughed and said I must've just seen a plane. No one wants to believe, I guess, that such things exist. Thanks for this site, and the opportunity to share. DJ