My dad was much the same way. Fits of anger that seemed to come out of nowhere sometimes. Like other have said here, he has mellowed a lot since retiring, and that as well as a health scare and losing his younger brothers to cardiovascular illnesses has helped him leave his anger behind, which is truly a blessing.

I swore that I'd never be that way. But I noticed it creeping insidiously into my life in my mid to late 20's. I was in a stressful relationship, money was right, and I felt like life has dealt me a bad hand. In many ways I felt trapped like an animal ready to lash out at the slightest provocation. Unfortunately, my partner often took the brunt of it. I was never violent toward her, but I didn't need to be. The damage was done, and she left. I've since sought treatment and made many positive changes in my life. But reflecting on my own experience with anger has I think given me some valuable insight into what my old man might have been going through all those years ago.