Reserves are also retained to pay for for unexpected events such as a flu pandemic or a foot and mouth outbreak.

BBC: Welsh government 'raided reserves' claims Plaid Cymru

Like a Republican congressman from Wisconsin taking an unexpected detour to say his piece and pay his respects to a constituency poorly served by both parties, despite the likelihood that he'll be hammered by some in his own party.

CNN: Is Ryan wooing Hispanics for 2016?

What might you do that is unexpected, yet within the realm of acceptability for your corporate culture, that would cause others to pay closer attention to you, your ideas or your product?

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Correlations between asset classes are appearing in unexpected ways, but are unlikely to reach holders of catastrophe bonds, the securities issued by insurance companies that pay tempting yields but can lose their value in the event of floods, earthquakes and the like.

ECONOMIST: Catastrophe bonds