I've personally seen two up close in my life, and that is two too many. One when I was a kid (permanently scarred), the other went right past us a few years ago. I know a lot of people who have been directly affected, and it is extremely devastating. Unfortunately, we can probably look forward to higher frequency and intensity with storms in the midwest in the coming years; I just pray the jet stream keeps them further south like last year - sorry OK and TX posters, but I am scared to death of the damn things