Cover your face with your hands, block out the light, and decide to wait it out.
It seems like forever, but at long last Bob's anger begins to subside. He stops yelling, looks around at everyone staring at him, sees you covering your face, and storms out the door. He slams the door behind him. A lone sheet of paper drifts lazily to the floor.
R&R: A reasonable choice on the face of it. Problem is, your withdrawal from the situation has left you powerless to prevent future explosions (and there WILL be future explosions, because Bob feels like an unappreciated fool, and you agree with him!)