If you live in Illinois or Missouri long enough, you will see a tornado eventually. That being said I highly doubt you've seen a twister that seemed to give birth to a rainbow like one did in Illinois this week.
You've likely seen your share of lightning and probably a lot of rainbows. But, I doubt you've ever seen lightning strike inside of a double rainbow and that's exactly what happened during a Midwest thunderstorm. Oh, and it happened on Friday the 13th.