Standing in line at the airport is not a lot of fun. All the waiting combined with the usual stress of boarding an airplane often leads to anxiety. That’s why the slightest hint of fun or entertainment at an airport is more than appreciated by any weary traveller. One lucky passenger at an airport in Poland got more than a hint of entertainment. The man got to witness a full-blown performance as he received a ‘Mamma Mia’ flash mob surprise while checking in! This video proves once again that music really is a universal language. Take a look and don’t forget to share.