The chubby kid in the Longhorn visor is a stickler for the rules. And he is none too pleased when he sees a PGA violation. If his opponent doesn't acknowledge that he's lying three, there will be consequences.
Kudos to the camera man for recognizing the comedy unfolding in front of him. (Although the damage to the golf bag stand seems to be over the top and overlooked by everyone.)
Language warning: Longhorn kid drops an F bomb there at the end.