Yes, I am a passive aggressive person. I usually let things roll off and then bottle it up and when I blow, yes I scare myself too. I did this last year when my husband forgot the date of our anniversary. The calmer side of me was able to see my overreaction but couldn't stop me from throwing his things outside and yelling until my face turned red and cursing and so on. I only do this with him, though which is so unfair, because he has never harmed or threatened to harm me in anyway. I mirror the rage that I saw my father have because it got attention and that is the way I know how to get it. Not a good way of thinking, though, I know. I'm trying, no correction, thinking of going back to therapy to get this stuff straight. That is my only suggestion. I think practice and working through your reasons for the rage will eventually help. I know that it feels like you will explode if the rage doesn't come out, but I know there are things that you can do to let that negative energy out.