Milwaukee Bucks star Giannis Antetokounmpo seems like a pretty affable guy most of the time, but during Saturday’s game against the Utah Jazz there seemed to be a slight lapse in his demeanor.

During a break in the action in the third quarter, Antetokounmpo could clearly be seen arguing with Bucks assistant coach Sean Sweeney.

Cameras were on Antetokounmpo, who could clearly be seen gesticulating at Sweeney and mouthing, “I will f–k you up.”