Low and slowflying triangle.I was out in my garden smoking a sigarett, looking at the stars, when suddenly a triangle came flying above my neighbours roof at low altitude (about 20 meters) towards my house, flying relativly slow (i guess 100km/t). For the short time i saw it (apr. 5 sec.) before it disapeared over my roof, it rooled first about 100 degrees one way, then it rooled back to level fligt and about 70 degrees the other way. I guess it was about 15 meters long on all 3 sides, and had light on the tips that was a bit less bright then the stars. It looked like it was computeranimated, it looked so unreal with a black body, that was a bit darker than the sky. It made a wery silent swosj sound as it pased over, like a gentle constant brees blowing in the leaves on a tree, only lower. I made a picture that i can mail.If you have any questions, you can contact me on email.