The person who is looking at everyone around him and silently trying to evaluate who he could beat up if sh*t went down.
The person who is looking at everyone around him and trying to figure out who he would sleep with, if sh*t went down in a very different way.
The person who gets to the front of the line, but realizes she needs to get something else only after the cashier already started ringing her up.
The person who refuses to make space for someone who is not in line but is just trying to get to a different part of the store, even though there’s no way his spot in line would be threatened if he just moved 2ft in either direction to let her through.
The person who acts like she's having an emotional reunion when any person she kind of knows walks up to her, and she then allows each person to cut in with her, thus screwing over the people behind, who, at this point, basically know the girl in line just as well as the guy who just walked up.