Ball lightening?

I was just reading an article in the New Scientist on line about the phenomenon of ball lightening. Then I remembered that I visited an old lady as part of my job, twenty years ago. We were having a chat over a cup of tea. She told me about when she was a lot younger. She was in her living room, maybe in the 1950’s? There was a lightening storm outside and she had got her window open as it was a hot day. Suddenly a ball of light floated in through the open window, bounced off the floor and then disappeared again. She had never seen anything like it but thought it might be ball lightening? I didn’t ask her much because I didn’t know what to ask. She went on to say that from then on she always unplugged everything electrical in the house and kept her windows shut in a thunderstorm in case it happened again.

I would love to see something like that. But would it be dangerous and knock out electrical equipment if they came into contact with each other? Strange how memories you’ve never had before can suddenly come back to you.