Sorry, Sarah, OT:
I guess so. Also intense rage and manipulation to frustrate the other person. I myself did few quite terrible things in session - I slammed the doors and threw stuff around and refused to leave sessions. I called my T after these sessions because I was afraid that he would leave me (because of my behaviour) and when it seemed that we are fine and he would only say that we need to talk about it next session, my fear left and the rage came back and I told him on the phone that we will not talk about anything etc etc.

I don't have BPD but it turned out that I do have a very borderline'ish part that emerged and got loose this way. It really sounds strange to say it (and many people probably hate me to say it) but only tightening the boundaries (up to the point of the T planning to terminate me after I had threatened him physically) calmed this furious creature inside me. Not calmed necessarily but it is now better confined in the sessions and as I am this creature I am forced to find ways to express my intense rage and horror without acting out this way.