I'm not normally an angry person, but anger poured out of me when I was manic in a mixed episode. I've been thinking about it and I realized I was repressing my feelings on a number of issues and maybe thats why they basically exploded when I was manic. I'm trying to find ways to process my anger in the moment now. I approach it basically like Bird Dancer described. I wait for the adrenaline to subside and then I try to find words to be truthful without being hateful or harmful. It takes practice, but it helps.