Fine particles dust the ground around Lindt & Spruengli factory in town of Olten after ventilation defect. A real lifeWillie Wonka would have been proud. But residents of a Swiss town got a bit of a shock when it started snowing particles of fine chocolate cocoa powder after the ventilation system at a chocolate factory malfunctioned. The Lindt & Spruengli company confirmed local reports on Tuesday that there was a minor defect in the cooling system ventalation making roasted "cocoa nibs" in its factoryin Olten, between Basel and Zurich. The nibs, fragmentsof crushed cocoa beans are the basis of chocolate. Combined with strong winds on Friday morning, the powder spread around the the vicinity of the factory, leaving a fine cocoa dustig. The said one car was lightly coated, and that it has offered to pay for any cleaning needed - but hasn't yet been taken up on the offer.