Continuity mistake: When they're having the Diversity Day meeting Jim's chair can be seen over Michael's shoulder several times. In the beginning of the meeting the chair is pointed towards his desk, but when Kevin says that he remembers the Chris Rock routine and begins to recite it, you can now see that the chair is pointed towards Pam's desk; however no one has left the meeting in that time. (The only person who's not in the meeting is Devon. He was at his desk and walking around a few times but it makes no sense that he would go and move Jim's chair.) It's obvious that the actor left the chair in different positions during different takes.