I am a veteran of the military and an amateur astronomer so i am pretty good at aircraft identifications and where lights should be in the sky. last night, 09/25/2016 at approximately 20:15 i saw what looked to be a triangle shaped craft over the city of eugene oregon. i had just stepped out on my balcony for a smoke and sat down in my chair facing east overlooking most of ne eugene and n springfield. looking in the sky above and well beyond the neighbors house at the sight line of the power lines i saw 3 orange lights equidistant apart and in a triangle. it occurred to me that there shouldn't be bright stars in the sky in that area that time of night and time of year so i  looked closer. as i  looked closer i saw the bottom most of the lights moving and then i thought to myself: that makes sense it is commercial aviation. so i looked back at the other 2 lights and saw they were moving together too and that it was one triangle shaped craft rotating on its center axis. all the while i  noticed the bright orange lights were shining through what looked like heat shimmer coming off the desert floor. very much like a scene from the movie "predator" the "cloaking" around it wavered for just a brief second and when it did i saw a large triangle shaped craft with smooth sides and a smooth metallic bottom with a smaller circular abutment in the center with a light bluish glow. the craft stopped rotating and it looked like a harrier jet pulling up its nose on a vertical takeoff and then it disappeared. it did leave but as it was leaving the "cloaking" kicked back in and it disappeared from sight. like something out of the x files 2 helicopters showed up within 30 seconds of the object disappearing. eugene is a small city and helicopters are fairly rare here with just a couple of overflights a day but these stayed on station for the better part of an hour circling over the eugene/springfield area.