Continuity mistake: In the scene where Hanna shoots up the interview room, including two soldiers, she gets blood spattered on her face and forehead. The blood is there throughout the subsequent chase but disappears when she is standing in the clean room motioning the doctor to get in the locker (most noticeably it's gone from her forehead). She didn't wipe it off because it reappears just after she shoots the man in the locker when she's stealing the medical report from the desk.
Penance
25th Mar 2012