&quot;His nosy neighbor had spied him trying to work out some properties of the model of price-setting he was about to present. Perhaps she couldn’t differentiate between differential equations and Arabic.<p>Menzio showed the authorities his calculations and was allowed to return to his seat, he told me by email. He said the pilot seemed embarrassed. Soon after, the flight finally took off, more than two hours after its scheduled departure time for what would be just a 41-minute trip in the air, according to flight-tracking data.<p>The woman never reboarded to the flight.&quot;<p>Unbelievable