Grey Ball UFO spectacular occurs in 1992 !!!30.11.1992, Karlsruhe/Germany, Durlacher-Tor Place.I and my Colleague walking on Foot-Patrol in our Area (working as Securityman at the State-Government). At time 21.55 h my Colleague see first a strange Thing in the Nightsky, and say "look to this !!".And the Action on Sky whats than moved i never foreget in my Liftime.A very big Grey Ball take abstract Movements in Zig-Zag-Course on the Nightsky. Slightly larger as Venus in the Nightsky, so estimatedAirliner Size. It's takes radical Change of Direction on a Speed like min. 3000 kmph. Standing still for Seconds on Times, invisible for Milliseconds, and jump so around in a Airspace of ca. 3,5 x 3,5 km. It was not realy self light shiny, and looks grey and not white like normal Stars (I think it was only visible because it was illuminated from below by the city lights). I guess the Object diameter ca. 25 - 35 meter, and the Altitude on ca. 3000 - 5000 meter, the flying Altitude was very Constance all times. Sometimes the object lingered for about 1-2Seconds at a Position. After about 3 min raced the object with even much higherSpeed (approximately +5000 kmph) straight to the west to view the Horizon. Here, the Object was at least as fast as in the Atmosphere penetrating Meteorite.This Thing gots no Sound, no Contrails and no Engine-Fire or so.The Incident was reported to a German UFO Research Centre (GEP), and is regarded as inexplicable.One Thing is certain, the Maneuvers and the Speed of the Object was clearly too fast for this World and the normal Physik ....Exactly the same object displays, for example, a NASA videoshows. Mid-nineties-years NASA has more of these objectsrecorded