Discuss Ball Lightning and related effects. What is it? Do you have personal experience seeing it happen? Ever since reading a book about it, I found it a fascinating thing: to this day we still have not found an explanation nor a way to reliably reproduce the phenomena, even after knowing that it is real.

>Ball lightning is an unexplained phenomenon described as luminescent, spherical objects that vary from pea-sized to several meters in diameter. Though usually associated with thunderstorms, ball lightnings are said to last considerably longer than the split-second flash of a lightning bolt, and are a distinct phenomenon from St. Elmo's fire.
https://en.wikipedia.org/wiki/Ball_lightning