ImprovEverywhere has done it again with the 11th annual No-Pants Subway Ride.

ImprovEverywhere is a group that does things on large scale that alter the way people see their day.

From having masses of people just stop, freeze on the spot for a couple of minutes in stores or rail stations, to having hundreds of people in a park turn off their radios at exactly the same moment.

With the no-pants subway ride, thousands of people board trains and remove their jeans, trousers and slacks to stand around, unconcerned, as if it is a normal everyday thing, in their underwear. The reactions of those not in on it can be priceless.

This year it happened in 59 cities in 28 countries around the world…