I have also had tantrums in the office. I think I'd have been better off having them on paper because T would have been better able to understand what I was thinking. Instead I just flailed around angry and he misinterpreted what was going through my head.
Actually, now that I think about it, I have had tantrums in emails too. When I told him I was really embarrased, T told me the therapist part of him was glad he was able to see what was going on with me. (I'd imagine the human part of him was thinking "
dude, what a psycho!" 
)