I was quite shocked about the Southwest Airlines-incident, where the fuselage ruptured and left a gaping hole in the roof. I thought this was a unique happening, but checking the internett, I learned that this has happened several times:

The last Southwest incident: http://en.wikipedia.org/wiki/Southwest_Airlines_Flight_812

Can you believe they actually has had a similar event: http://en.wikipedia.org/wiki/Southwest_Airlines_Flight_2294

The worst incident of this kind I guess; Aloha Airlines Flight 243: http://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243

Qantas Flight 30: http://en.wikipedia.org/wiki/Qantas_Flight_30

China Airlines Flight 611: http://en.wikipedia.org/wiki/China_Airlines_Flight_611

And these examples are just a few... Scary!