A mass pillow fight in Trafalgar Square in central London on April 5, 2014 on International Pillow Fight Day. (Photo by Jane Scanlan)

A couple shares a light moment in a Mass Transit Railway (MTR) subway train in Hong Kong, China on August 28, 2019. (Photo by Anushree Fadnavis/Reuters)

North Koreans perform during a mass game of “The Land of the People” at the May Day Stadium in Pyongyang, North Korea, Tuesday, June 25, 2019. (Photo by Jon Chol Jin/AP Photo)

People take part in mass water fights during the first day of Songkran, or Thai New Year, on Khao San Road in Bangkok on April 13, 2023. (Photo by Lillian Suwanrumpha/AFP Phoot)

A young Catholic waits for the start of mass at the church of Saint John the Baptist during the mud festival at Bibiclat, Nueva Ecija province, northern Philippines, Monday, June 24, 2024. (Photo by Aaron Favila/AP Photo)

Palestinian couples participate in a mass wedding ceremony in Hamad City in Khan Younis, Gaza Strip, Tuesday, December 2, 2025. (Photo by Abdel Kareem Hana/AP Photo)

An Indian bride adjusts her veil during a mass marriage ceremony in Ahmadabad, India, Sunday, October 11, 2015. Sixty five Muslim couples tied the knot in a single ceremony organized by a social organization. (Photo by Ajit Solanki/AP Photo)

North Koreans perform during the “Arirang” Mass Games at the May Day Stadium in Pyongyang, as part of celebrations ahead of the 60th anniversary marking the end of the 1950-53 Korean War, in this photo taken by Kyodo July 22, 2013. (Photo by KYODO)