Apparently the previous 3000 character Atlas Park Pan wasn't enough for its creator. He added another 700 players to it. I was playing Meta Lad at the time -- so if you see a short green haired individual in Black and Gold, it might just be my character. I've yet to pick him out. But I expect he's in there... Somewhere
I find this a wild video -- seeing as it had to be done through demo editing tricks and created. The game engine never allowed for more than 100 player characters in a zone at once.