20 Movie facts you probably didn't know about.

1. Many of the weapons on "Serenity" were based on paintball guns as revealed by the concept art.

2. One of the Mercedes used in "The Hangover" was stolen from the parking lot early during principal photography, the next day the production requested the assistance of the local police to hold up traffic and one of the production members noticed the stolen Benz in the line of cars being held up. The PD then arrested the driver and the car was recovered.

3. The miniature sets used in "Kill Bill Vol I" were actually leftovers from a Godzilla film.

4. The mugshots that were used in "The Shawshank Redemption" to portray a young-looking Morgan Freeman were actually pictures of Freeman's younger son, Alonso Freeman.

5. When asked what he thought about the critically-panned game "Fight Club" (Based on the film of the same name), Author Chuck Palahniuk said "They can do whatever they want with my book as long as the ****ing check clears."

6. Most of the cast and actors in "Alien" did not know what would happen during the chestburster scene, their reactions are mostly natural.

7. Janet Leigh broke her arm before filming for "Touch of Evil" began, her cast had to be removed or hidden for many of the scenes as the filming could not be delayed any further.

8. Nicolas Cage prepared for his role in "Leaving Las Vegas" by binge drinking and associating himself with prostitutes.

9. Robert De Niro tracked down Al Capone's original tailor and had him make identical clothing for "The Untouchables".

10. Stanley Kubrick wanted to get an insurance policy to protect himself from loses in case extraterrestrial life was discovered before "2001: A Apace Odyssey" was released. The insurer declined.

11. The computer used to show the video feeds of intruders breaking in to Jasper's hideout in "Children of Men" is an Apple 20th anniversary Mac, which would be 30 years old in the movie.

12. At one point, Joseph Gordon-Levitt was considered to play Spider-man in the 2012 reboot "The Amazing Spider-man".

13. The scene with Tom Cruise in "Vanilla Sky" where he walks around a desolated Times Square was not computer-enhanced. The production crew was given unprecedented permission to shut down Times Square for one Sunday and they filmed the scene in one day.

14. The police were called on Sacha Baron Cohen a total of 91 times during the production of "Borat".

15. Seth Rogen wrote the part of Saul in "Pineapple Express" for himself , however during a rehearsal he realized James Franco was funnier than him.

16. Christina Ricci actually wore a forty pound chain during the filming of "Black Snake Moan". Director Craig Brewer brought several chains on the set and Ricci chose the one that suited her best.

17. R. Lee Ermey was hired to act as a consultant for Tim Colceri who was supposed to play Sgt. Hartman in "Full Metal Jacket", however after Kubrick watched a 15-minute tape in which R. Lee Ermey performed a demonstration in which he yelled obscene insults and abuse for  stopping, repeating himself or even flinching despite being continuously pelted with tennis balls and oranges, Kubrick decided to give him the role.

18. Steven Spielberg got permission to film inside Auschwitz but chose not to out of respect for the victims who had died there. He chose to film the scenes in a set instead.

19. One of the conditions that Christian Bale set in order to become Batman for "Batman Begins" and its sequels was that Robin didn't appear on any of the films.

20. Members of the Hell's Angels were used as extras in the bar scene when Henry Hill is arrested in "Young Guns" as they had run out of extras. After the scene was completed, the Hell's Angels were hired as security personnel.