Anyone who's worked with doctors, especially surgeons, know that some of them have a bad temper. I have no idea if more doctors have a bad temper than in the general population. I have no idea if they started out with the rotten temper or if it developed from being giddy with "attending power." I have no idea if the bad tempered doctors are bad tempered outside of the hospital as well. All I know is that I've gotten yelled at a lot for no good reason (and sometimes for kind of a good reason).
For example, during my sub-I, there was one day when our attending Dr. Brown decided to systematically rip apart the whole time. (At the end of his rampage, the senior resident actually said, "Stop it, Dr. Brown, you're ripping apart my team!")
I still remember why he started screaming at me. It was because one of my patients was supposed to be discharged that day, but he needed PT to walk him around first. I had put in the order and even called PT, but they failed to show. Was this my fault? No. But Dr. Brown said what I did wrong was that when PT didn't show up, I should have walked the patient around myself. Of course, my patient was an elderly obese man who weighed twice what I did and was attached to an IV pole. Absolutely nothing could go wrong with that.
Another time, during residency, I got yelled at by an attending named Dr. Green in front of several other residents for something I did wrong on home call. I still honestly am not sure what I did wrong, other than being unable to instantaneously transport myself from home to the hospital after getting paged. In any case, after it was over, the other residents comforted me and said that everyone knew I didn't do anything wrong, and that Dr. Green just had a bad temper.
A couple of months later, Dr. Green was telling us about how he'd been walking through a parking lot with his daughter in her stroller, and a car had driven dangerously close to them. His response was to yell and kick the car hard enough that he said he dented it pretty badly (scaring the female driver into quickly driving away). Although I was silently cheering for him because I'd been in that same situation and not had the nerve to do anything, I also recognized that this was not normal behavior. It was pretty obvious Dr. Green had anger issues and we were all just at his mercy.