A man (C ) taking part in the “No Pants Subway Ride” shares a laugh with a non participant while riding on the U2 Subway line in Berlin on January 12, 2014 . “No Pants Subway Ride”, is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. In the UK, where the word pants refers to underwear, the event has been translated as “No Trousers”. AFP PHOTO / ODD ANDERSENODD ANDERSEN/AFP/Getty Images