Somewhat appropriate for Amazon I was looking up emergency or distress signals that can be used in civilian situations and came across a Quora.com article.  The information presented was about flying the national flag upside down (all countries have the same meaning) as a sign of something has gone horribly wrong, in military situation like a sinking of a ship or in a civilian situation like hostage crisis in a building, school or hospital. It was brief but interesting.   But what was odd but ironically appropriate was the amazon.com advertisement directly under the article about the flag.   The webpage displayed as follows:  ad by Wikibuy The dead giveaway that tells you when Amazon has a lower price. This tool looks for lower prices at other stores while you shop on Amazon and tells you where to buy. https://www.quora.com/What-does-it-mean-if-you-hang-your-national-flag-upside-down (I don't know if the amazon add changes or is permanently on this webpage.