You saw him clench his fists and growl, so that he then punched the wall, leaving it cracked. It was normal to see him mad. His anger issues is rather…horrible. The CEO’s made him like this…

"Damn it...God fucking DAMN IT!!"

He growled, shaking his hand in pain, and walked away. Maybe you should go over there and try to talk to him, but at the same time, he scared you. Monty gave snarl as he walked to the wall again, punching it again.