The object was a football shaped object with no lines it had a pulsating green haze and a trail of green light.

It happened back when I was in high school. There were four of us ridding in my car down the Natchez Trace Parkway just in front of the Visitors Center. It was just getting dark out and on the tree line 75 yards ahead of us a football shaped object with no lines sort of like a teardrop but with two points. It had a green pulsating glow and a green trail of haze. It came from the east side of the tree line to the west tree line. The object was moving to slow to be a plane and we were close enought to tell the it had solid mass and the shape of a football. The size was about the size of a standard passenger car. We turned our car around and went home. I never saw the object again.
One of three submitted by same source.  Date is approximate.  PD