Continuity: When Sean Austin escapes though the large culvert there is only a small stream of water running though, when he returns a few minutes later the stream is much wider and deeper.

Continuity: When the lead terrorist wakes up the morning after his father is murdered in prison, he discovers that the power has been cut to the school. Shortly after that, when the boys enter the restroom, you can see that the lights above the mirror and on the ceiling are lit. It may be possible for SOME lights to be working on battery power (like the ones above the mirror), but it's not likely that all of them would be battery backed up.

Revealing: At the beginning of the film when a Judge is thrown out of the airplane, you can see a parachute is attached to him.

Visible crew/equipment: In the scene where the headmaster's furniture is outside, the shadow of the camera can be seen. As the camera moves into a high-angle shot, the shadow grows bigger.

Continuity: When Luis Cali is strapping Billy Tepper in the office, he is standing in front of the desk, while Billy is standing on the opposite side. Billy is facing him (while bending forward), so the strapping marks on Billy's back should be vertical, from head to butt, or at least diagonal. But later when the guys are cleaning the wounds, the marks are horizontal.

Other: When the police first arrive at the school, one of the terrorists appears to fire a .50 caliber machine gun at the front of the squad car, causing minimal damage. If that were true, the entire car would have been torn to shreads. I was in the US Army, and have fired the M2 .50 caliber machine gun. The rounds for one of these are big and heavy; they can shoot down aircraft, or destroy armor plated vehicles.

Continuity: When the school is standing on the lawn after putting the professor's office there Sean Austin has a banana peel in his hand, in the next shot it is gone, and then it is back again.