Continuity mistake: Towards the end of the movie, Frost comes out to tell everyone that Roman has been killed. We hear over the 2 way radio Sabian saying "Let's get you some help." Just before he says that, you can see in the background behind Frost that Sabian is already helping Roman out the door. Seconds later Sabian starts helping Roman out the door. (02:04:00)
Plot hole: In the lobby of police headquarters, Danny Roman's lawyer tells him to make a deal with the prosecution. Danny turns to his wife Karen and tells her to wait in the car and he will be right back. Then he proceeds to go upstairs and overtake Niebaum's office. Much later when Chris Sabian is negotiating, Karen arrives on the scene wondering what's going on. How long was she waiting in the car? (00:28:35)
Plot hole: In the final scene Sabian gives the bogus discs to Frost who crumbles them up. After Frost is shot outside, Sabian is helping Danny Roman out of the house, he is holding the discs in his hand. Since they couldn't find the real discs and the computer was destroyed what were these discs he was now holding?
Continuity mistake: In the scene where Samuel L. Jackson is walking by the stairwell to get J.T. Walsh, the SWAT team member is not handcuffed to the stairwell, and in fact is not seen in the room. A few seconds later, as Samuel L. Jackson is attempting to push him into the other room, the SWAT member is shown handcuffed to the stairwell. (01:42:11)
Factual error: Chris Sabian tells them to "Cut the electric, cut it now." Shortly afterwards Danny calls Chris on a cordless phone. Cordless phones only work if the base unit is powered, so Danny wouldn't have been able to make the call. This happens a few more times when they turn the power on and then off again. (01:17:40 - 01:20:30)
Factual error: An ambulance would never be parked directly in front of a hostage scene, as shown at the end of the movie, because (a) the ambulance would have to arrive before the police, (b) that location puts both the medics and the ambulance itself in jeopardy if shots are fired, and (c) the ambulance would be blocked in by the numerous police vehicles and thus unable to quickly leave with a wounded patient.
Factual error: When Sabian views Niebaum's chair, you can see the bullet holes through the chair and into the desk behind it. The SWAT members were using 9mm MP5s, and they would use hollow point ammunition. Hollowpoints bloom when entering the body and do not pass through. Even if they used full metal jacket rounds, 9mm still wouldn't pass through a 250 lb man, a chair, and into a metal desk.