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  • The moment at which two people, approaching from opposite ends of a long passageway, recognize each other and immediately pretend they haven t. This is to avoid the ghastly embarrassment of having to continue recognizing each other the whole length of the corridor.

    Douglas Adams, John Lloyd (2005). “The Deeper Meaning of Liff: A Dictionary of Things There Aren't Any Words for Yet--But There Ought to Be”, p.58, Crown Archetype