I don't recall which year it was, but in the summer during a baseball game at the local park. 3 balls of light came down and bounced around on the feild and then suddenly took off, witnessed by hundreds of fans, it was big news in the newspapers at the time.
They said it was ball lightning, Didn't go over with the locals who were use to Northern Lights, etc.
Just something you may want to check out. I can't find anything about it now.