Continuity mistake: Just before Demi Moore is about to get her head shaved she sees the base commander about equal treatment, and we notice very visibly that O'Neil has one side of her face bruised and all red and swollen. But in the next scene, which takes place moments later, when O'Neil is shaving her head, her injuries are all gone. Where did they all go to?
Continuity mistake: During a training session, Jordan forms a human ladder with another trainee to get her team over an obstacle. The Master Chief is watching this scene through a night-vision scope on his rifle. His line of sight is initially level, then suddenly alters to show the view from a lower perspective.