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In consideration of cost savings, director Renny Harlin chose Montreal, Canada as the filming location for the film, because it provides great convenience for encouraging the promotion of the film industry from the government to taxation.
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The film saved as much money as possible during the filming process, but in fact, the money saved was also spent on polishing the film during post-production.
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Renny Harlin allows all actors to complete the action scenes and stunts themselves, especially in those plots with flying scenes. Harlin insists that no other digital technology is used to deal with it, and it is entirely necessary for the actors to naturally rise, fall or slash in the air.
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Every actor participating in the film must undergo a month of physical training before shooting .
The Covenant behind the scenes gags
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Reid Garwin: [when teacher says Stephen King] Yeah! Dreamcatcher was the shit.
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Reid Garwin: [seeing a girl in a short skirt, slapping a twenty on the table] Blue. Cotton.
Tyler Sims: [slapping down a twenty] Pink lace.
Pogue Parry: [slapping down a twenty] Boys, that girl hasn't worn panties since she was twelve.
Pogue Parry: [a gust of wind blows the girl's skirt up, revealing no panties. Pogue walks off with the money, smirking, and hands it to the bartender] Keep the change, man.