Sometimes they appear to roll, spin, hop, or vibrate. There movement doesn't seem related to wind speed or velocity. Ball lightning sometimes carries a significant charge, and sometimes no charge. Some witnesses have reported being seriously shocked and others not at all. People have sometimes gotten burns similar to those caused by ultraviolet radiation from touching ball lightning.
Most reports show no evidence of radiant heat from the balls, even at close range.
Most researchers agree that ligtning balls are real, but no one knows what they are. Researchers are also unable to reproduce ball lightning. The next time you view a lightning storm - look for these balls of light. The ancient Greeks reported seeing strange glowing balls moving across the sky. They are not alone.