probably a secret from area 51at approx 2:00 am while leaving las vegas, on route 15, my vehicle was almost knocked off the road, i thought it was an earthquake, we pulled over and stopped. got out of the car and again an extremely loud explosion over head. sounded like something breaking the sound barrier. (jet) however, i have been a military man for 6 years, and a police man for another 5 years, and never have i hear anything this loud or this fast... now i say fast because it made a third pass. and this time we could see the most incredilbe plane or whatever.. it was moving very slow, compared to what we assumed. estimated speed maybe 100 mph. seem to be floating. then all of a sudden, gone, not flew away, just disappeared, and about 30 seconds after it vanished, bang another loud explosion, this time we were almost knocked off our feet. the concussion sas great. no we were not drinking, nor do we have any drug problem. did not report this to anyone, nor will i ever report it. just thought you would like to know, seems to be from my view, not a ufo as most think, but a ufo of our u.s.a. its really not our business. when the gov. wants us to know, they will let us know.((NUFORC Note: Witness elects to remain totally anonymous. PD))