This one needs very little explanation.  The one that peeves me the most is the people who get to the counter at a fast food place (note the words “FAST FOOD”!) and then take forever to decide what they want.   As the guy says, there are probably a lot of people in line behind you that already know what they want.  It amazes me sometimes how oblivious people are to what’s going on around them, I call it “COTUS” or “Center of The Universe Syndrome” and they will continue to take their sweet time despite the fact it’s bothering others who are patiently waiting.  If you see someone with COTUS, try to get in front of them at all costs.