Jean-Claude Van Damme was originally cast as the Predator with the intent that the physical action star would use his martial arts skills to make the Predator an agile, ninja-like hunter.[6] But when the 5'9" Van Damme was compared to Schwarzenegger, Weathers, and Ventura — actors over 6 feet tall and known for their bodybuilding regimens — it became apparent a more physically imposing man was needed to make the creature appear threatening. Predator (film) - Wikipedia
Before Rick Moranis was cast as Wayne Szalinski, the script was written with Chevy Chase in mind because of his popularity in National Lampoon's Vacation. He was filming the second sequel, National Lampoon's Christmas Vacation, and was too busy to portray Wayne. John Candy was also considered for the role of Wayne. He declined, but suggested to director Joe Johnston that his friend, (and costar of SCTV, Little Shop of Horrors and Spaceballs), Rick Moranis, would be a good choice. Marcia Strassman portrays Wayne's wife, Diane, who is having marital troubles with him.Honey, I Shrunk the Kids - Wikipedia
The building at 55 Central Park West served as the home of Weaver's character and the setting of the Ghostbusters' climactic battle with Gozer. The art department added extra floors and embellishments using matte paintings, models, and digital effects to create the focal point of ghostly activity.[26][27][6] During shooting of the final scene at the building, city officials allowed the production to close down the adjacent streets during rush hour. This affected traffic across a large swath of the city. Gross remarked that, from the top of the building, they could see traffic queuing all the way to Brooklyn. At various points, a police officer drew his gun on a taxi driver who refused orders; in a similar incident, another officer pulled a driver through his limo window. When angry citizens asked Medjuck what was being filmed, he blamed Francis Ford Coppola filming The Cotton Club. Aykroyd encountered science-fiction writer Isaac Asimov, a man he admired, who complained: "You guys are inconveniencing this building, it's just awful; I don't know how they got away with this!"[9] Directly next to 55 Central Park West is the Holy Trinity Lutheran Church, which is stepped on by the Marshmallow Man.[27] Ghostbusters - Wikipedia