 " Business School " was the second Office episode written by Brent Forrester . Forrester had previously written " The <unk> " . The episode was the first to be directed by Joss Whedon . Whedon , who is a friend of both producer Greg Daniels and Jenna Fischer , and also met most of the production staff prior to the episode , stated that he chose to direct the episode " because I already know the writing staff and a bunch of the cast , and I <unk> the show . " When informed that the episode was about a bat entering into the office and one of the characters pretending to be a vampire , Whedon thought that it was a joke , stating " <unk> 't I just leave this party ? " in reference to Buffy the Vampire Slayer . In an interview featured on the third season DVD , Whedon joked that the " Business School " episode and his former TV show were very similar because " Buffy [ ... ] was sad and depressing but ... it was funny . Especially when people died . And a lot of people do die in [ ' Business School ' ] . " But upon completing the episode , Whedon stated " That was just coincidence . But that 's how that happened . God , it was fun . " Whedon stated that he was surprised with the amount of input he was allowed with the script . " I wouldn 't say freedom to do things with it ... But way more input was asked for than I would have ever anticipated . " At Pam 's art show , the pieces which she was supposed to have painted didn 't suit Whedon . " I got to the set and saw Pam 's art , and I was like , ' This is not right . ' " Whedon said that he held up filming for over an hour until the staff was able create new pieces of art . 
