1. It Originally Had A Different Name
Ghostbusters was originally called ‘Ghost Smashers’, because the film studio had yet to secure the name ‘The Ghost Busters’, which had previously been the title of a 1970s live action kid’s TV show.
2. It Was Originally Set In The Future
Reitman and Aykroyd’s original story took place in the future where there were teams of Ghostbusters everywhere (like Paramedics and Firefighters). It was decided that this would cost too much money, so a change was made to set it in the modern day.
3. It Could Have Starred Some Other Big 80s Actors
John Belushi and Eddie Murphy were originally supposed to be in the film, but Belushi died before the film started shooting, and Murphy decided to star in Beverly Hills Cop instead.
4. Sigourney Weaver Impressed In Her Audition
When told during her audition that her character would be possessed, Sigourney Weaver began growling and barking like a dog, as well as getting down on all fours. Director Ivan Reitman was so impressed that he immediately cast her in the film.
5. Some Of The Scenes Were Filmed Illegally
Some of the footage from the Ecto-1 montage sequence was filmed without permits, meaning that in one shot Dan Aykroyd is chased down the street by an actual security guard.
6. There Was Alot Of Improvisation During Filming
For example, the party scene with Rick Moranis and his guests was almost entirely improvised.
7. They Used Alot Of Shaving Cream
The marshmallow goo that explodes on William Atherton is actually 50 pounds of shaving cream.
8. Marshmallow Man Was Expensive
The Stay-Puft Marshmallow Man suits cost $20,000 each.
9. The Ghostbusters’ Phone Number Actually Worked
In the original trailer, the ‘555’ number seen in the film was replaced by a working 1-800 number, which led to a recording of Bill Murray and Dan Aykroyd. The number received a thousand calls an hour, 24 hours a day, for six weeks.
10. Slimer Is Based On The Late John Belushi…
Slimer is a based on John Belushi’s character John ‘Bluto’ Blutarsky from ‘Animal House’.
11. …And Was Referred To As ‘Onion Head’ During Filming
Slimer was only given the name ‘Slimer’ by audiences after the film was released.
12. Ivan Reitman Is Zuul
The film’s director Ivan Reitman provided the voice of Zuul, the demon that possesses Dana.
13. It Was Inspired By Real Life Events
Ghostbusters was inspired by Dan Aykroyd’s grandfather, as well as his own genuine interest in real-life paranormal events. Aykroyd, who co-wrote the film with Harold Ramis, even claims that his grandfather invented a device that would allow people to communicate with ghosts via radio waves.
14. The Ending Was Added At The Last Minute
Aykroyd and Ramis came upon the idea of ‘crossing the streams’ during filming of the finale. This meant that an earlier ‘set-up’ scene had to be filmed and edited in, explaining the danger of combining the energy streams in that way.
15. You May Have Seen The Fire Station In Another Film
The Ghostbusters’ headquarters was remodeled as the mechanic shop in ‘The Mask’.
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