Revealing mistake: Look at the gun fired behind Shale at the firing range. The person doesn't pull the trigger, there is no flash, the slide doesn't move, there is no smoke. But the gun still kicks.
The Substitute (1996)
1 revealing mistake - chronological order
Directed by: Robert Mandel
Starring: Tom Berenger, William Forsythe, Luis Guzmán, Richard Brooks, Raymond Cruz
Other mistake: Early in the movie when Shale is screening the commercial for his "services," the rolling text describing his abilities lists "Helicopter Repelling" instead of "Helicopter Rapelling".
More trivia for The Substitute