Only in New York.  A group of people, most who are probably just coming home from the bar, break into song on a subway.  It's so catchy, everyone on the train joins in.  It's almost like it was a planned 'Bohemian Rhapsody' flash mob.  Looks like someone caught the sing-a-long on their phone.

Admit it.  You couldn't resist singing along if you were on the train too.