“After looking at it for a few seconds, I thought I would time it along the section lines on the ground and calculate a speed of this very fast car. Within a few seconds I realized that what I thought was going to be a Corvette, in fact, was a flat black colored, tubular object that was flying low level over the highway. It was cigar-shaped and not flying with the end of the cigar pointing forward but perpendicular with the long edge in the direction of flight.”
The UFO passed beneath him at a high rate of speed and then turned translucent, vanishing from site, though he claims to have been able to see the outline of it racing over the ground.
Lots of detail, more here.