people who walk slowly in stairwells
people who walk slowly in stairwells and have another person right next to them, slowing down everyone behind them
people who walk slowly in stairwells and exactly in the middle so they take up twice the space of a single person
people who turn about-face in the middle of the hallway and cause you to bump into them
people who go down the up staircase
as you can tell, I'm really impatient when it comes to getting through classes on time
