I don't remember a smell being mentioned, but in a little back-to-back cottage with a coal fire that might not even have been noticed, especially by a child. This story dates back 40 years, and the actual incident probably 40 years before that, so forgive me for not remembering more. However, I also remember two other things being mentioned- there was a fringed lampshade in the room, and the fringe stood out at right angles- just like everybody's hair standing on end, and the skirt the witness was wearing sticking out like she was 'doing a twirl' and the ball made a noise 'like frying bacon.'
There was obviously a huge static charge attached to the ball- probably why it dived for the best earth point in the room- the cast-iron fireplace
How I got to hear this tale, in my mind gives it great credibility. It was in a factory I was managing in Nottingham, and in the dog days of a very hot summer. One of my staff always wore trousers, and (since she was complaining about the heat) I said 'wouldn't you be cooler in a skirt?'. Then she told me -in the most matter of fact way about the reason she kept her legs covered. The teller was 'your ordinary housewife', properly working class and not given to flights of fancy. I can still picture her talking to me, I think the extraordinary nature of the event made (most of it) stick in my mind.