What is the black swan? Check out the short story "Black Swan" by the venerable Bruce Sterling from his collection Gothic High Tech.

Yet the news never shouts out that history has black swans. The news never tells us that our universe is contingent, that our fate hinges on changes too huge for us to comprehend, or too small for us to see. We can never accept the black swan's arbitrary carelessness. So our news is never about how the news can make no sense to human beings. Our news is always about how well we understand.

Whenever our wits are shattered by the impossible, we swiftly knit the world back together again, so that our wits can return to us. We pretend that we've lost nothing, not one single illusion. Especially, certainly, we never lose our minds. No matter how strange the news is, we're always sane and sensible. That is what we tell each other.

..."You've got a look on your face right now like a drowned fish."