People across the world travel in their underwear on No Trousers

For the 17th year in a row, something incredibly bizarre has been happening on tube trains across the globe.

No Pants Subway Ride' day has travellers in their underwear in 60 countries

Global No Pants Subway Ride 2012: gallery of photos larger than you might actually wish to view - Boing Boing

Commuters baffled as hundreds strip down to their pants to ride the London Underground - Mirror Online

The Sisterhood of the Traveling Pants (2005) - IMDb

The No Pants Subway Ride - Improv Everywhere

No trousers day on the tube London, Annual no trousers day …

People Around The World Went Pantless For The Annual “No Pants Subway Ride”…

This is why people are not wearing trousers on the tube this weekend - Yahoo Sport

No Trousers Tube Ride: Trouserless travellers take to Tube for event

No Pants Subway Ride' day has travellers in their underwear in 60 countries