Extremely large noisy object seen at close range lights up mountainside and takes off.This is a second hand report based on conversations from 3 co-workers that I found credible due to the nature of the converstaion.After work 2 brothers arrived near home at about 10:30 pst at Pyramid Lake Nevada. They saw 2 red lights descending towards the mountains. This seemed strange to them and as thay observed more closely they described realizing that it was a single very large (aporox 1/4mile perhaps longer in length) elogated object due to the fact that as it moved it blacked out the stars between the two red lights. These lights ocasionally faded or brightened with changes in motion of the entire craft.They pulled over and got out of the car .. the object continued to move across the mountains occasionally descending behind and back up. A loud noise was associated with the movement of the craft. One brother described the sound like a shotgun blast that lasted the whole time. The other brother described it as like the sound of an earthquake rumble/shock sound but louder. No vibrations or shockwaves were felt by either brothers.At one point the object stopped over the mountain top about 2 miles from their position and lit the mountainside with a very intese yellow light this lasted at least 15 seconds the light allowed them to see the mountainside in exceptional detail, sagebrush, trees, rocks.At this time another freind of theirs returning home to the same area pulled over beside them and observed the following. The craft moved away acompanied by louder noise and up into the sky disapearing.The craft never seemed to turn in relation to their position so that only the one aspect of the object was ever presented to their veiwing position. No protrusions were observed. The shape of any other sides were not evident. They have lived in the area for years and are used to military aircraft in the area, helicpoters, jets and munition explosions. This was FAR different from anything they had ever seen.The next morning they observed two military jets lingering and flying around the area of the sighting.I had overheard my three co-workers talking amongst themselves and began to ask about their sighting. At no time during our conversation did I feel the story to be made up or exagerated. They appeared genuinly astonished and awed by what they witnessed with no attempt to impress or gain noteriety. They are in their early twenties in age had not been drinking as they were just returning home from the end of their shift.I have related this to your website as I have never heard a more detailed or unusual eyewitness account that I felt to be credible and honestly given. I certianly cannot account for the information provided with any manmade object. I hope I have related the information of the converstaions I had with them accurately.((NUFORC Note: Witness indicates that the date of the incident is approximate. PD))