The animal was the thickness of a pencil and a uniform dark color on top with a slightly lighter shade under. I thought it might be a glass lizard and checked in "Amphibians and Reptiles of the Carolinas and Virginia" by Martof etc. Nope. The coloring did not match with any of the three glass lizards illustrated. I browsed the snake section and there it was - a worm snake. Length was right, location was right, photo matched. Apparently it is a common snake but rarely seen.
Photo by J.D. Willson

You can read about this snake and see photos at the Davison Herpetology site or at this site from the University of Georgia.