After receiving a sudden slap on his face by Lucas, James was naturally incredibly enraged. But when he saw Lucas's cold gaze, he felt as though ice-cold water had been poured over his head, and his anger dissipated a little.
James finally regained some rationality, and he subconsciously recalled the several conflicts that he had had with Lucas, as well as the consequences that he had had to bear after each of them.
During the first dispute they had at Amelia's kindergarten, Lucas kicked him away without mercy. And his subordinate Jordan, who was just as terrifying, managed to beat up James's underlings all by himself. Until now, those underlings had still yet to be discharged from the hospital.
Later on, during the conflict at the hotel restaurant, Lucas had beat the living daylights out of James's elite bodyguards, whom he had spent a bomb on. Since then, James knew that Lucas was not to be provoked.