Nothing much happens to me when I get hungry except that I get hungry.
But some people are different: they get angry and pick fights.
Indeed. I know that quite well because I’ve been closely and even at times intimately involved with people who do just that. It took me many years to realize what was happening. What was all this moodiness about, and these sudden flashes of rage? Hunger didn’t account for all of it, of course, but it certainly was correlated—so much so that I finally learned, after years of puzzlement, to ask a simple question whenever the unprovoked peevishness occurred, “Are you hungry?”
And now I’m happy to learn there’s a word for it: “hangry.” Solution? Eat more often—duh!