I want to go back to this event. I saw this object in the corner of my eye, so I started recording. At first I thought it was a helicopter because it has 2 blue flashing lights. Then I noticed that I didn't hear anything at all. It initially flew in a line. Until it suddenly accelerates to the right at the end of my recording, stops briefly and continues flying. Shortly after the lights went out, I saw the black object. Unfortunately, I can no longer remember whether the object was jagged or round. My question is: which flying object has the technology to accelerate suddenly and then to stop. Which physical forces must have acted on the object?