I had this one dad with his son walking out in front of me all the time and going so slowly, with another guy behind me who did not understand the concept of personal space.  I'm not normally a violent person, but I wanted to punch him in the face so badly, and it was taking all my will not to say, "Dude, do you want to kiss me or something?"

And then just walking down the aisles, never knowing who will jump out at me and trying to dodge everybody while also not making eye contact because if I do, I can't control my facial expressions, and they'll see how irritated and/or anxious I am.  

And then at checkout, the cashier placed my meat on top of all my ready-to-eat foods like bread, so they added on something to worry about at home as well.  Anxiety homework.