I have met odd individuals during my career that seemed to get more wound up than others over events at work that they had little to no control over. Some ran between aircraft to try and recover the schedule and others went a shade of puce when there were technical defects; there was an underlying current of anger I suppose. These days people can get into a spiral of doom with too much echo-chamber use of social media reinforcing concerns that are mostly of little real impact or even imaginary.
It does seem that the occasional undesirable personality slips through the psychometric net, the “you looking at my girfriend!?” type who could start a fight in an empty room. The level-headed majority end up treading lightly around them - for me the acid test is how much I have to run through what I’m going to say to them in advance of saying it, in case it contains something that might trigger them.