Revealing mistake: When Shuya impales a commando with a pipe, the strap holding the pipe in place is visible, when he turns towards the camera.
Visible crew/equipment: During the gunfight between the terrorists and the students, in the rundown building, a cable can be seen supporting Kurosawa.
Nao Asakura: One day, they'll all disappear. Family, friends... But I'll always be by your side. I can't do anything for you, but I'll be there. I promise.