A friend and I were driving past our local shopping center when we noticed some odd lights in the sky. We observed the lights created a distinct boomerang shape. The UFO was flying overhead slowly until it came to a stop. The UFO then appeared to be lowering altitude towards us. It started moving away so we drove to try to keep it in view, but a building got in our way. When we finally saw the UFO again, it was already towards the horizon.