Probably taking low kicks from everyone during the entire session, and that last kick was the nail in the coffin. Look at his stance, he's not going to be checking much kicks, he's very forward heavy, 80:20 lead to rear leg weight distributed. If he's been going hard, and others respond back similarly, he's basically taking near full force leg kicks repeatedly.The doctor was in on that low-kick KO, lol. Nice, Frode. What brought him to his knees there? Looks almost like his other knee buckled from the immediate weight-shift after you chopped down his leading leg.