I use the public transportation system, and given that I have an hour in metro and that I need to change metros once, I walk quite fast.
What bugs me the most are people on stairs who barely move their feet, still, they don't allow you to get by them either. Or those on the fast line who're barely walking. I hate it.
The thing I have a problem with is eating with all my collegues at the same table - we're 9 or 10. I'm not used to it, I only eat with people I'm very comfortable with, plus I don't speak while I eat - I hardly have breakfast in the morning and by noon I'm famished. And what's even worse is the stupid sily conversation at the table, Jesus!! After I eat, it's getting better and my disposition is getting sunnier, though

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