In the short scene in Fight Club when Brad Pitt and Edward Norton are drunk and hitting golf balls, the actors really were drunk, and the golf balls were sailing directly into the side of the catering truck.
While filming his death in 'Goodfellas' Michael Imperioli cut his hand on a glass and was taken to the ER where the doctors rushed to treat his fake bullet wounds.
The head-in-the-box ending of "Se7en" was originally rejected by the studio, but David Fincher was accidentally sent the original screenplay with that ending, convincing him to make the movie. The producer still objected to it, but Brad Pitt refused to act in the film unless the scene was kept.
The Matrix' government lobby scene was real. There is no CGI in the scene, just the actors with special effects. All the explosions are real. The office building was a real set, the helicopter on wires, all the firing, real as well as the water pouring all over the place.
15Good Will Hunting
In the movie "Good Will Hunting", the therapy scene caused Johnny (the cameraman) to laugh so hard that the camera's POV can actually be seen moving up and down slightly as it shows Damon breaking character by also laughing so hard.
The 1972 hit movie 'The Godfather' does not contain the words ‘mafia’ or 'la cosa nostra’ because of a deal struck between the producer and the real mafia.
17Shaun of the Dead
During the filming of 'Shaun of the Dead', one of the zombie extras walked up to Edgar Wright, and not knowing he was the director & co-writer, whispered in his ear and joked "Oof, straight-to-video for this one!"
For the 1990 film "Arachnophobia," advertisers were uncertain as to whether they should market the film as a thriller or a comedy. Therefore, television spots promoting the film billed it as a "thrill-omedy".
19One Flew Over the Cuckoo's Nest
The set of "One Flew Over the Cuckoo's Nest" was a real mental hospital and many of the extras were authentic mental patients.
In the famous 'Casablanca' scene where French refugees defy the Nazis by singing their national anthem, many are played by actual refugees who had just fled the Nazis, which is why many are visibly weeping as they sing.