Continuity mistake: Four girls walk into the school and make a right turn into a hallway that is perpendicular to the double-wide blue door. They walk down the hallway for some distance, past at least three long sections of 15-20 student lockers between classroom doors. After the homeroom bell rings and only two girls are standing in the hallway, they are practically back to the double-wide blue door (near the first long set of lockers). (00:18:45 - 00:19:52)
Continuity mistake: When Oliver is pushing injured Michelle in a chair down the hallway, they are approaching a long row of student lockers. When the camera shifts to a front view, they are near a stairwell and the short walls behind them are cement and brick with no lockers before the door. (00:41:05)