“In the unlikely event of a water landing…”

One might also call this "Airline Fact of the Day":

My friend Peter Thompson did some research on this. At least going back to 1970, which by my estimation encompasses over 150 million commercial airline flights, there has not been a single water landing! (Some planes explode and fall into the water, but he couldn’t find anything resembling a water landing where any of those instructions might help you.) So perhaps 15 billion customer trips have heard that 10-15 second set of instructions without it ever being useful to anyone.

That is from Steve Levitt.  Here is the official site of Unlikely.  Here are unlikely stories.

Addendum: Do read the comments, the "fact" appears to be wrong…