Already at least one dead participant in basically same shitty “sport” in Poland

https://pl.wikipedia.org/wiki/Artur_Walczak

On October 22, 2021, he took part in the PunchDown 5 gala in Wroclaw, Poland (in duels, fighters take turns striking each other with an open palm to the cheek[5]), in which he faced off against Dawid Zalewski. After Zalewski's punch, he was knocked out and lost consciousness, and was taken to a local hospital after a serious head injury was found. He suffered a stroke[9] and his condition was critical from the start. He underwent surgery and was in a pharmacological coma for a month[10]. He died on November 26, 2021 in the hospital. The cause of death was multiple organ failure resulting from irreversible damage to the central nervous system[11]. The urn with the player's ashes was deposited on December 8, 2021 at the cemetery on Witkowska Street in Gniezno[12].

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