One palpable change in the center of Zagreb over the last five years or so, during which I have been spending ever more time in the city, is the number of motorcycles that roar around the pedestrian area. My beloved’s apartment happens to be on a street that must be quite dear to motorcyclists. Every few minutes, another one roars past. On occasion, the apartment building shakes as they accelerate between traffic lights. When I started spending ever-longer periods in the Croatian capital, there were hardly any motorcycles of this ilk in the city. They are quite expensive, and many of them cost as much as a car. This is a clear sign of the city’s economic success in spite of Croatia’s doldrums since the onset of the global financial crisis. Chances are that the number of motorcycles has also grown in several other cities—such as Split, Rijeka, and Osijek. Come to think of it, their roars could be used as a proxy of economic success, which could be measured by just a few sensors placed at key locations throughout the leading Croatian cities. Audible success could be much fun for researchers, as well. Correlations with long established measures of economic success would also attract sociologists and psychologists, who would be able to say a word or two about the reasons behind the motorcyclists’ propensity to roar. Or so I entertain myself after a few motorcycles too many that have roared past my beloved’s apartment building today.