Another fine episode from this series. My only complaint about this episode was that you never got to find out what the stain actually was. Maybe it's because I like having answers and this is not a show you put theories on. However then again maybe it's better you don't find out. I also thought that maybe Michael acted too childish even for him. He was still very funny in this episode. He had some good moments. When he suggested that him and Jim be desk buddies (no it's really okay) Also when he pushed Kevin into his office and shut the door. You also get to see his people skills when Dwight messed up a potential sales call (due to Michael's advice). It was not only funny but shows that Michael is actually a good worker.
Also funny were when Michael went to his temporary desk and Kelly talked his head off. Check out the deleted scene that tells you more about this. It's pretty funny. Like many things in season 2, this was another start of something This time it's the first step to Kelly and Ryan. Another small detail I liked is when Michael and Dwight raided accounting, check out the scene between Dwight and Angela.
The producers did a good job of fooling you that Jim and Pam had tension between them. That is until the ending. It might have been one of the sweeter endings at this point in the series.