Season 4 Episode 7: After Michael isn't invited to a camping trip with Ryan, he sets out to prove that he can brave it out in the wilderness by himself. Jim, who is in charge of the office while Michael is gone, tries to change the birthday policy.
From Season 2 Episode 3: OFFICE OLYMPICS - Jim and Pam arrange an `Office Olympics' for the staff when Michael and Dwight got out for the day to close a deal.