Download Ethiopian Airlines
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When you view the movie (you have to download it), note how the left wing gets torn off as soon as the engine hits the water and how the other wing breaks due to the gravitational forces exerted upon it.
The proverbial "water landing" referred to by all airlines is better alluded to as a CRASH and the picture shown in the "What to do in case of emergency" (found in the seat in front of you when in an aircraft) brochure is nothing but a poor attempt at trying to fool people into thinking that the laws of physics do not apply to conventional aircraft.
Why not build airplanes that can withstand a crash? -- accidents are bound to happen ... that's their nature!