Also I’ve been looking for something like this article in the Economist for a while:

“Your life-jacket can be found under your seat, but please do not remove it now. In fact, do not bother to look for it at all. In the event of a landing on water, an unprecedented miracle will have occurred, because in the history of aviation the number of wide-bodied aircraft that have made successful landings on water is zero. This aircraft is equipped with inflatable slides that detach to form life rafts, not that it makes any difference. Please remove high-heeled shoes before using the slides. We might as well add that space helmets and anti-gravity belts should also be removed, since even to mention the use of the slides as rafts is to enter the realm of science fiction.”