Just like I mentioned earlier with my husband. As mild-mannered as Clark Kent until he had his stroke, and now he flips out if dinner is at 630 instead of 600. It's not all the time, though. He just has his phases where he gets pissed about, like, everything, and then he levels off. Then pissed. Then not.
Have y'all noticed that?
Yes, my father would cycle thru stages of anger. It was usually intense but short lived and not completely irrational. He just became short tempered.
Einstein, "science without religion is lame, religion without science is blind."