Black triangular craft was hovering over my town area for over half an hour, it looked to be inspecting or looking for something.I was up late on the internet playing games. I became aware of a hummung sound that dipped and grew louder, it sounded like a helecopter, but different, it seemed to be moving around te area. After 30 minutes, i grew curous that it had not stopped, and went outside in the garden to look for this mystery 'helecopter' type sound. I stepped through the garden on to the street and looked.. what i saw i will not forget. There was a dark triangle drifting around the sky at fairly fast speeds and acceleraton, seemingly scanning the area i live in. It was triangular with lights on the tips and was spinning slowly, and was turning at speeds that were impossible. It seemed that i had only just got to the end of my garden pat when the thing turned and converged over where i was. I ran inside and after about 15 minutes, the sound stopped. I asked my mother about it the next day, and she said the sound had awoken her and that she had seen it from her window.((NUFORC Note: Date is approximate. Witness elects to remain totally anonymous. PD))