“AN ACADEMIC economist was taken off a plane last week after a fellow passenger became suspicious. He was feverishly scribbling what she thought was “terrorist code” or foreign lettering into a notebook. It turned out that Guido Menzio, an Italian economist from the the University of Pennsylvania, was working on some differential equations for a model on menu costs and price dispersion. Thankfully, Mr Menzio was allowed back on his flight.”
More read here: http://www.economist.com/blogs/buttonwood/2016/05/airline-safety?fsrc=scn%2Ftw%2Fte%2Fbl%2Fed%2F?fsrc=scn/fb/te/bl/ed/airlinesafetytenwaystotellyoumightbesittingnexttoaneconomist