Great Balls of Fire

Said to be the most rare natural phenomena, ball lightning is the unusual appearance of floating, glowing balls that appear after a lightning strike. When they do appear, they hover slowly through the air for a few seconds, then disappear with a gentle fizz. Others dance on an inexplicable path appearing to chase people, and come to an end with a deafening crash. They can leave gaping wounds in buildings and trees and can pass through walls and windows without leaving a trace. Passengers on airplanes have reported them hovering through the cabin. The program takes a look at eyewitness reports and reveals how modern science is trying to explain this mysterious phenomenon.