The yearly prank, organized by New York City based prank collective "Improv Everywhere" was started in 2002, asking participants to ride subway lines trouser free and act straight faced about it.
akm-img-a-in.tosshub.com/indiatoday/styles/medium_
London commuters strip down, walk around half suited and booted for 'No Trousers Day' - India Today
No Pants Subway Ride' kicks off with train commuters around the world stripping off
Commuters strip down to their undergarments to participate in the annual No Pants Subway Ride - India Today
A No Trousers Tube Ride Is Back For 2024 With A Twist
No Pants Subway Ride' day has travellers in their underwear in 60 countries
No pants subway ride 2014: Commuters drop their pants across the world – New York Daily News
People ride the subway without their pants - Rediff.com
London commuters strip down to their pants for No Trousers Tube Ride
Activists Strip Down To Underwear on 'L,' But Cubs Fans Not Impressed - Rogers Park - Chicago - DNAinfo
No Pants Subway Ride' kicks off with train commuters around the world stripping off