WAYCROSS, Georgia -- Strange things happen in the 700 miles of mostly wet wilderness that comprise the Okefenokee Swamp.
Locals here cheerfully trade stories of being pursued by odd glowing orbs of green light, alien abductions and encounters with the Pig Man, a Southern version of Bigfoot. These mysterious meetings purportedly occur both deep within the swamp and along the dark and lonely roads that border it.
Swamp gas is formed by decaying organic matter that has been naturally transformed into a luminescent gaseous form, Knight explained. No one knows why the gas globs sometimes appear to track and pursue humans. Some assume it's an optical illusion caused when headlights or flashlights illuminate the gas, but others aren't so sure.