Commuters strip down to their undergarments to participate in the

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.

TfL Elizabeth Line commuters baffled as hundreds strip to their pants to ride the tube - Essex Live

Commuters strip down to their pants for 'No Pants Subway Ride 2020

Commuters in New York, Boston and London strip down to underwear for No Pants Subway Ride

London commuters strip down to their pants for No Trousers Tube Ride

No Pants Subway Ride 2016: London commuters strip down to underwear in international celebration of silliness - Irish Mirror Online

In pictures: London commuters strip for 'No Trousers On The Tube Day', London Evening Standard

Londoners strip to underpants for annual No Trousers Tube Ride

Commuters shocked as hundreds of people get on London Underground with no trousers on - Daily Star

London commuters strip down to their pants for No Trousers Tube Ride – The Irish News

No-Trousers Day in London Subway Commuters Strip Down, Walk Around Half Dressed in Their Underwear

No Trousers Tube Ride 2020: Londoners Strip Down to Undergarments and Take The Underground Ride For Their Quirky Annual Celebration (View Pics)

Activists Strip Down To Underwear on 'L,' But Cubs Fans Not Impressed - Rogers Park - Chicago - DNAinfo

No pants subway ride 2014: Commuters drop their pants across the world – New York Daily News

Commuters in New York, Boston and London strip down to underwear for No Pants Subway Ride

Cheeky travellers shed their modesty