Yeh I didn't break anything but I did throw something across the room infront of my patients & swore loudly at a Dr. Similar to what you describe it was a building agitation/frustration/anxiety that set it off, I felt the wave of "I'm going to hurt you" come over me. Afterwards I cried & felt like a weirdo. I think it was anxiety in my case but I had just upped to 40mg fluoxetine & was later described as hypomanic by my therapist when I saw him a few days later.

I agree with Imah, I think it enhances existing personality but makes it very difficult to suppress. I know I have that angry, vengeful side to me & in an episode & under pressure it is expressed. Your certainly not the only one.