The subway without pants

In New York and other world cities to subway passengers Sunday again surprised by half-naked fellow travelers.

The action has no purpose, it is done purely for fun. No Pants Subway Ride was conceived in 2001 by the New York collective Improv Everywhere, as a 'celebration of silliness,' a celebration of silliness.

Last year alone, 4000 people participated in New York. Also include Buenos Aires, Hamburg, London, Melbourne, Prague, Stockholm, Tokyo and Warsaw steps people without pants on the subway.