I grew up in the southwest corner of MO which is still part of Tornado Alley. I actually witnessed a tornado once down there but I didn't get a picture of it (though I have pictures of tornado damage). I regret it to this day LOL. We sat and stared at it a moment, then went under the house. It was so out of the blue and unexpected, I think we were just a bit shocked.

This one was pretty unexpected too. There wasn't a speck on the radar and suddenly this formed very quickly.