answer: Sandra looks furious because she is sick and tired of all the office power struggles. She thinks that Tim is trying to sabotage her career because she is doing a better job than he is.
documents: #Person1#: Hey Sandra, what's wrong? You look furious!
  #Person2#: I've had it with Tim! I think I'm going to quit!
  #Person1#: But Sandra... you love your job! You spent months trying to get this position. It's perfect for you!
  #Person2#: Yeah... I know. But I'm sick and tired of all the office power struggles!
  #Person1#: What kind of power struggles are you talking about?
  #Person2#: Basically, I think Tim is threatened by me. I'm doing a better job than he is so he's trying to sabotage my career!
  #Person1#: So he talks about you behind your back?
  #Person2#: Yes. He's all nice and friendly to my face. But the second I turn around he stabs me in the back!
  #Person1#: I had a worker like that once. She was always taking credit for my ideas.
  #Person2#: I should keep a better record of my correspondence with the clients so if necessary I can prove it was my effort.
  #Person1#: My co-worker had a whole bunch of bad office habits. She liked to name-drop... we would be in a meeting and she would say, yesterday I was chatting with Tom. She meant Tom Solomon... our CEO.