What can happen when a song is so catchy the whole world knows it? Take a look at this scene, shot in a subway car in Madrid. A young rider with a microphone gets on and starts singing "La Bicicleta" by Carlos Vives and Shakira. A group of girls take over and soon enough, the entire train is singing and dancing.
The video has already had 4.9 million views on Facebook and over 64,000 shares. As one Facebook poster wrote: "I want to ride on that train!"
Watch the dance party below and try not to join in the boogie yourself.