just as it's supposed to. but something else expands, too, those cracks in the 737s fuselage. suddenly, there's an explosive decompression. its force is so powerful, a flight attendant is sucked out of the plane. >> i saw what i think was the stewardess' feet as she was being sucked out of the plane. magazines, briefcases, shoes, you name it, anything that wasn't tied down was going out that hole. >> an 18-foot section of the plane is gone. passengers sitting nearby can see the sky above and the ocean below. all that's holding the 737 together and just barely are the floor beams and the plane's belly structure. >> about 2 rows in front of me i could see the floor was buckling up, the plane was bending in the middle. >> you can't just have a very strong piece of the bottom of the airplane without having a strong piece of the top. when they lost that crown, it