You might as well have had his son sitting at a desk yelling at him for being an idiot and telling him the simple solutions, to which he says "LOOK KID, I'VE BEEN IN THIS BUSINESS BEFORE YOU WERE BORN, I KNOW WHAT I'M DOING!" riiiiight before the partner bottles him on the head, to which his son has this annoyed "I told you so" look on his face.