My father told me about seeing ball lightning. A orangish sphere the size of a grapefruit came
through a stove pipe where it went into chimney, landed on sink ledge, then went down the
sink drain.if I remember correctly, this is an ionized gas plasma. I'll go search for that.
Here is one of several URLs about ball lightning:http://www.pupman.com/listarchives/1998/April/msg00221.html
A better one:
http://www.tbns.net/mediapoet/tech19b.htm