It was pretty "interesting" - well, a bit scary to be honest as a 12 year old.
As I remember it, it was not too long before school was to get out. The principal came on the intercom and announced that everyone should get under their desks due to the severe weather. I remember looking out the windows and seeing that it was black as night outside - at least it seemed like it to me. They made us stay there and said we wouldn't be allowed to go home until our parents came and got us.
My dad showed up soon thereafter and took us home with lightning popping all around and it still seeming dark. My dad was a Kansas farm boy so he was no stranger to tornadoes but even as I kid I could sense it wasn't good. He sent me and my siblings to the basement to "play" while he hung out upstairs. Turns out the funnel passed right over us and touched down about 3 or 4 miles east of us.
Our little suburb's paper did a "look back" at the twister not that long ago.
You can clear here to read more about it - there is a link to a PDF with the actual article.That was certainly the closest I personally have ever come. This past summer we did have a supercell pass right over where we were camping on the plains and put down twisters about 9 miles away - that was the second closest! :-)
Tony