People participate in the annual “No Pants Subway Ride” in the Manhattan borough of New York City, U.S., January 13, 2019. (Photo by Caitlin Ochs/Reuters)





Participants in the 11th Annual No Pants Metro Ride at Union Station on January 13, 2019, in Los Angeles. (Photo by Ringo Chiu/ZUMA Wire)





18th Annual No Pants Subway Ride N.Y.C. on January 13, 2019. (Photo by Bruce Cotler/Globe Photos via ZUMA Wire)





Young people wearing no pants participate in the “No Pants Subway Ride” in New York City, 13 January 2019. No Pants Subway Ride is an annual global event started in New York, USA in 2002. (Photo by William Volcov/ZUMA Wire)





A participant in the 18th Annual “No Pants Subway Ride” laughs with a police officers on January 13, 2019 in New York. The “No Pants Subway Ride” is an annual event started in 2002 by Improv Everywhere in New York, the goal of which is for subway riders to dress in normal winter clothes without pants while keeping a straight face. (Photo by Johannes Eisele/AFP Photo)





People take part in the annual “No Trousers On The Tube Day” (No Pants Subway Ride) on the London Underground Jubilee Line, posing for photographs at Canary Wharf, in London on January 13, 2019. The No Pants Day (Trousers in UK) is a participatory annual event that has happened in various nations. It requires wearing just undergarments in the lower part of body in public. (Photo by Alberto Pezzali/NurPhoto via Getty Images)





People take part in the annual “No Trousers On The Tube Day” (No Pants Subway Ride) on the London Underground Jubilee Line, posing for photographs at Canary Wharf, in London on January 13, 2019. (Photo by Alberto Pezzali/NurPhoto via Getty Images)





People take part in the annual “No Trousers On The Tube Day” (No Pants Subway Ride) on the London Underground Jubilee Line, posing for photographs at Canary Wharf, in London on January 13, 2019. (Photo by Alberto Pezzali/NurPhoto via Getty Images)





People take part in the annual “No Trousers On The Tube Day” (No Pants Subway Ride) on the London Underground Jubilee Line, posing for photographs at Canary Wharf, in London on January 13, 2019. (Photo by Alberto Pezzali/NurPhoto via Getty Images)





People take part in the annual “No Trousers On The Tube Day” (No Pants Subway Ride) on the London Underground Jubilee Line, posing for photographs at Canary Wharf, in London on January 13, 2019. (Photo by Alberto Pezzali/NurPhoto via Getty Images)





A man stands on the platform of the West 4th, F subway line during the 18th annual No Pants Subway Ride on January 13, 2019 in New York City. 24 cities participate in the annual event arranged by Improv Everywhere, a New York city based comedy collective. (Photo by David “Dee” Delgado/Getty Images)





A woman stands on the platform of the West 4th, F subway line during the 18th annual No Pants Subway Ride on January 13, 2019 in New York City (Photo by David “Dee” Delgado/Getty Images)





A woman rides the F subway line during the 18th annual No Pants Subway Ride on January 13, 2019 in New York City (Photo by David “Dee” Delgado/Getty Images)





A woman is photographed by straphangers during the 18th annual No Pants subway ride on January 13, 2019 in New York City (Photo by David “Dee” Delgado/Getty Images)





A group mingles at 14th street Union Square meeting point during the 18th annual No Pants Subway Ride on January 13, 2019 in New York City (Photo by David “Dee” Delgado/Getty Images)





No Pants Day in its 18th year as people ride the subways from the five boroughs to Union Square in Manhattan, New York, U.S, January 13, 2019. (Photo by Rashid Umar Abbasi)





A man climbs an escalator while transferring trains during the 18th annual No Pants Subway Ride, Sunday, Jan. 13, 2019, in New York. The pantless prank began in New York but is now staged in multiple cities across the world. The only two requirements are that participants be willing to remove their pants on the subway and keep a straight face about it at the same time. (Photo by Kathy Willens/AP Photo)





Young people wearing no pants participate in the “No Pants Subway Ride” in Prague, Czech Republic, 13 January 2019. No Pants Subway Ride is an annual global event started in New York, USA in 2002. (Photo by Martin Divisek/EPA/EFE/Rex Features/Shutterstock)





Participants in the 18th Annual “No Pants Subway Ride” travel in the subway on January 13, 2019 in New York. The “No Pants Subway Ride” is an annual event started in 2002 by Improv Everywhere in New York, the goal of which is for riders on the subway train to dress in normal winter clothes without pants while keeping a straight face. (Photo by Johannes Eisele/AFP Photo)





Passengers not wearing pants ride down escalators as they take part in the No Pants Subway Ride in Prague, Czech Republic, Sunday, January 10, 2016. The No Pants Subway Ride began in 2002 in New York as a stunt and has taken place in cities around the world since then. (Photo by etr David Josek/AP Photo)