Was walking by the Necker river in the city of Heilbronn in Sep at 11:00 11:30 was a bit cloudy a plane in the distance and I see for about 8 to 10 sec a sliver spear with what looked like a seam going around it in a cross form almost rivit like seam and it looked like it opened up or can morhp into something else when it opens.It was kinda big about as big as a van or a little bigger!no sound went into some clouds and vannished!.And it seamed to be shimmering also like it wasnt real!.A mirage like wave around it wierd!..I have seen the same spear on youtube and other UFO web places!..I think its a probe?.I,ve seen many things in my lifetime and been interested in the UFO phen and Paranormal for over 35 years!.