Flying Ferris WheelWhile waiting at traffic lights, I noticed what looked like a grey ferris wheel appear from a cloud and then fly into another cloud.The object was at 2000m.It travelled at 600-700mph.It was as large as a mid-sized jet airliner such as a Boeing 757.It was slate grey.It made no sound.It emitted no light.It was not like any aircraft I have ever seen due to it's shape and there was something strange with the way it flew, but I can't put my finger on it.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))((NUFORC Note: We are uncertain as to whether this is intended as a serious-minded report. PD))