Margen
Elliot Aronson's experiment was simple: groups of people listened to a recording of a quiz contestant answering questions. Sometimes he was brilliant (92% correct), sometimes mediocre. And in some versions, at the end, you could hear him spill a cup of coffee on himself.
The result gave its name to the pratfall effect: the brilliant contestant was liked more when he spilled the coffee than when he didn't. The blunder didn't diminish him — it removed the distance. The mediocre contestant, though, was sunk even lower by the same accident.
The lesson comes with a catch, which is exactly why it works: the stumble only helps once competence is already established. But once it is, hiding every flaw is a bad strategy. The boss who admits she got it wrong, the speaker who drops a page and laughs, the expert who says "I don't know": they are all, without realizing it, spilling the coffee.
Don't cultivate clumsiness. Cultivate something better: the calm of not needing to look perfect. People don't like admiring from afar. They like recognizing themselves.