Bishop73

Continuity mistake: When Theo is at the computer, locking the building down, the pens in the pen holder keep changing positions throughout the various shots.

Bishop73

Continuity mistake: When John and Karl are fighting, after John is shot, the amount of blood on John's arm changes. When John's back is toward the camera there's hardly any blood, then when he's facing the camera his arm is covered in blood.

Bishop73

Chief Dwayne: Now you listen to me, mister. I don't know who the hell you think you are or what you're doing, but you just destroyed a building! Now we do not want your help, is that clear? We don't want your help. I've got a 100 people down here and they are covered with glass!
John McClane: Glass? Who gives a shit about glass?

Bishop73