When I was about 16 or so, I was looking up into a starlit sky at the Summer Triangle. I saw a “star” moving kind of slowly and erratically. It circled Deneb, and then went on a tangent. A second or two later, it winked out.
The whole display lasted about 20 seconds. I have no idea what it could possibly have been.
Later I realized that if something seems to be wandering approximately in the same place, it could be headed right at me. I lucked out that time if that were so.