Monaco is the world’s most densely populated country, and a tax haven for rich Europeans—including more than a few F1 drivers. Now, given the amount of supercars stalking the streets of the tiny principality, you’re sure to hear ferocious exhaust notes frequently. If you don’t want to stick out as a tourist, take this woman’s reaction to the Koenigsegg’s twin-turbo V8 as an example of what not to do.