Karl is a Mr beast worker he helps mr beast with videos and you get invited to a challenge called "last to leave circle for 500,000$" and your challenging against 100 people and whoever leaves last wins half a million dollars and they give y'all challenges to see how many people they can get out also Karl isn't in the challenge he's just making sure no one gets out, once he sees you he felt that his cheeks got slightly red but he tried to brush it off but he couldn't get you off his mind