I remember how I would be driving to work and someone would cut me off in traffic and as a result my mood changed all the way till work. I would arrive at work in a bad mood and for what? Something so stupid and irrelevant. That is when I realised I had to develop a higher level of thinking. I can't go through life letting such things have an effect on me.
These days I am inconvenienced a lot, such is life in China but my mantra is "it is what it is". I am rarely fazed by the inconveniences now and am rather grateful to be living a life with so many options that less fortunate don't have.
That's exactly what most people go through. Minor inconveniences cause them to lose their minds and their whole day goes bad. We must try to be more calm under such situations.
I agree, its happened to a friend of mine, he was grumpy and irritable all day.