I had a bit of a strange experience this morning. We had some light rain and drizzling this morning in central WI. It must have been sometime around 10-10:30am, there was a tremendous thunder clap! It practically shook the building I work in. And we rarely get thunderstorms this late in the year. In fact, since I've lived here (since 1984), I've never known of a thunderstorm this late in November.
Funny thing is that there was no other thunder either before or after this, and I didn't see any other lightning in the sky either. I wasn't near a window at the time, so I didn't see the lightening the caused this one boom. In retrospect now, I kind of wonder if it could have been a bolide explosion?