TIL There was a 55,000-person Yugioh riot in 1999 over special-edition cards, with riot police called on the kids at the Tokyo Dome

https://www.latimes.com/archives/la-xpm-1999-sep-24-mn-13493-story.html

https://www.reddit.com/r/todayilearned/comments/15kphi0/til_there_was_a_55000person_yugioh_riot_in_1999/