I was driving down i-80 from elko nv, to las vegas nv. i was in between a small town called elberz and wells nv. i looked up at the sky a very bright object, bright green was hovering a little below the base of the mountain. distance maybe a mile out or so, easy to see maybe 50 ft long maybe. i asked my wife what that was as i looked at it, no hele light no plane lights just a bright green orb. she saw it too and said "i don't know". not five seconds later the object descended at speeds nasa nor the military could ever do. and it was gone, didn't vanish over the mountain it looked as though it went straight into the ground. but no debris flew the light did not dim out just vanished. when i saw the object i felt like something wasn't right. when it descended i had a sense of fear, because of how fast the object descended downward and disappeared. my wife thought it was nothing, but i knew myself that was not of this world.