When driving away in the Bentley after backing into the cop car, the rear end is seen in perfect condition.
When Crewe first gets to prison he is kicked off the bus and he lands on his back. The back of his hair and shirt are extremely dirty. When he meets with Warden Hazen a short time later, the back of his shirt and hair are clean.
In the library scene, Officer Dunham keeps dropping books from Megget's pile onto the floor and making him pick them up. The last time he does this he drops one book on the floor. When Megget gets up however, he has more than one book in his hand.
Caretaker receives a package with a birthday cake inside from which he scoops out a pair of cleats, destroying one whole side. In the following scene, Switowski is eating the cake, which only has the center dug out.
At many different times in the movie, Nate's facial hair keeps switching from a gray beard to a black mustache, back and forth.
Many of the convicts have long hair and facial hair. In the Texas prison system, convicts are required to be clean shaven, and hair cut very short.
During one of the scenes where Unger is in the guard's locker room, he sees Halo 2 (2004) being played by one of the guards. If you look at the screen closely, it is actually a Halo 2 demo which technically can't be played since it was just for the E3 preview.
Numerous penalties in regulation rules football (i.e. covers almost all areas of football) are committed without being called as such, even after the officials agree to call the game fair. Some examples: -Early in the game, Turley and Crewe help push Megget for a first down. Helping the runner in such a way is a ten yard penalty. -Several players remove their helmets while on the field of play after a down. Unless a timeout has been called or the game stopped for any reason (which it wasn't), this is a fifteen yard unsportsmanlike conduct penalty. -Several violent actions used are fifteen yard personal foul penalties (and probably ejection from the game if done in such a fashion), including punching, drop kicking an opponent, and clotheslining. However, most of these are done for comic effect. -Paul Crewe gives a downed official a "wet willy". Technically, this will get his team a fifteen yard penalty and result in Crewe's ejection from the game.
When Crewe (Adam Sandler) first steps on the field to play against the guards you can hear some people say "Sandler" instead of Crewe.
When Paul Crewe first arrives in prison the guard punches him in the stomach and he falls to his knees. You can see the shin guards on his legs.
Early in the story, the warden tells Paul Crewe he wouldn't be playing football for the prisoner team and that he would only be consulting. Later in the story, the warden tells Paul he must play and "go along" in order to get along.
When the fight breaks out in the first play of the game, a sniper is seen shouldering his rifle, and we hear the sound of a pump action shotgun being pumped.
In the library scene, Guard Engleheart (Kevin Nash) bends down and says "Bet you'd like to hit us huh?", but the voice is not Nash's deep clear voice. It's clearly the gruff higher voice of Guard Dunham (Steve Austin).
When Crewe and Caretaker first meets Nate Scarborough, you can easily see the sun on the horizon. However, in the background of the scene, there's only small structures around. So why is there a huge shade in front of Nate?
When you see Crewe looking at the "girls" you see two women in the background, in an all male prison.
When Crew is stopped by police, he flees the scene. As he leaves the police officers are both shown talking on their portable radios at the same time. Assuming they are partners riding in the same car, they would be operating on the same radio frequency. Thus, they would not both be able to transmit at the same time, because it would just be jumbled garbage to anyone(dispatcher) listening.
During the game, there is a split screen of the guards on offense and the cons on defense. Knauer yells, 'White 50', you can clearly see one of the guards jump and the refs should've called a false start.