I actually called someone a "fucking asshole" to his face. Twice. In front of other people. All of whom agreed with me.
I also told an ex-boss, when he was apologizing for having gone batshit crazy on me 18 months earlier, that I had wanted to kill him at that time. That unnerved him for some reason.
I, uh, had a problem with filtering my emotions and spoken statements. Yet, when I went back to school, people were surprised to hear that. They only saw me as being nice. Talkative, but nice. I told them I have an awful temper that I try to keep in check. Sometimes, I don't try very hard.