Last scene in the prison is completely unrealistic
In reality, the prisoners wouldn't stop beating on the guards just because the red light went off. They probably wouldn't stop until all the guards were dead or at least knocked out cold.
shareYou know how after a basketball game or soccer game, there will be a riot outside the stadium, even during the game and inside the arena. Does ending the game ends the riot? Sounding the buzzer people will suddenly stop fighting? Nope they continued until police broke them up.
That is just a sport, maybe the riot starts because of a wrong call on the player or some player elbowed the opposing team. In this movie someone peed on your face, beat you up, violated your human rights. They would need a lot of police outside the prison to break up the riot.