Grey disk. One blue light. Smaller then smart car but bigger then basketballI was working at 45th floor with 2 more co workers at that time I seen some thing flying in the sky as I was. Looking slightly down. First I thought its a ballon but I stare to re confirm its a ballon then I discovered its a disk kind Grey Color object flying in very unique pattern. Me and one co worker of mine seen it as I called WTH is that thing to him ? I don't know how or where to report it in my city. I never believed in this stuff before but seen some documentaries about this kind of sighting. Afraid to tell anyone as they gonna think I am Retarded. That object was bigger then a basketball butt smaller the a smart car. It had very small light on one point which can be only seen once of its rotation.