An anti-government protester with her face painted as the Joker shouts slogans towards the Mong Kok police station during a march on Halloween in Hong Kong, China on October 31, 2019. (Photo by Kim Kyung-Hoon/Reuters)





A participant wearing a costume and make-up attends a Halloween parade at Walibi park in Wavre, Belgium, October 31, 2019. (Photo by Yves Herman/Reuters)





A person dressed up as a zombie attends a “Zombie walk” on Halloween in Essen, Germany, October 31, 2019. (Photo by Leon Kuegeler/Reuters)





A passenger wearing Halloween make-up sits on a bus as the bus is stopped by anti-government protesters during a protest on Halloween day in Hong Kong, China on October 31, 2019. (Photo by Kim Kyung-Hoon/Reuters)





A participant wearing a costume and make-up attends a Halloween parade at Walibi park in Wavre, Belgium, October 25, 2019. (Photo by Yves Herman/Reuters)





A person dressed up as a zombie attends a “Zombie walk” on Halloween in Essen, Germany, October 31, 2019. (Photo by Leon Kuegeler/Reuters)





Participants wearing costumes attend a Halloween party at a village in Bangkok, Thailand, October 31, 2019. (Photo by Athit Perawongmetha/Reuters)





Participants dressed as zombies take part in a “Zombie Walk” parade to celebrate upcoming Halloween in Kiev, Ukraine on October 26, 2019. (Photo by Gleb Garanich/Reuters)





A participant takes part in a “Zombie Walk” parade to celebrate upcoming Halloween in Kiev, Ukraine on October 26, 2019. (Photo by Gleb Garanich/Reuters)





A participant wearing a costume and make-up attends a Halloween party at a village in Bangkok, Thailand, October 31, 2019. (Photo by Athit Perawongmetha/Reuters)





A participant wearing a costume and make-up attends a Halloween party at a village in Bangkok, Thailand, October 31, 2019. (Photo by Athit Perawongmetha/Reuters)





A kid dressed as the Joker is pictured during Halloween celebrations in La Paz, Bolivia, October 31, 2019. (Photo by Kai Pfaffenbach/Reuters)





A child walks in an evil clown Halloween costume in Santiago, Chile, Thursday, October 31, 2019. (Photo by Rodrigo Abd/AP Photo)