During the production, the film's star Lance Henriksen presented Director Nicholas Gyeney with the portrait James Cameron had painted of him as द टर्मिनेटर (1984) before casting Arnold Schwarzenegger in the role.
After production, Director Nicholas Gyeney and Lance Henriksen got matching tattoos to commemorate the film and their passion for it.
The script references Dr. Jason Pyatt's deceased father. This is a direct reference to Writer, Director Nicholas Gyeney's own life. His father died when he was just 12 years old.
In the flower shop scene, an actor can be seen wearing a t-shirt with the words "The Falling" written across it. This is the title of Director Nicholas Gyeney's first film, which he shot when he was just 19 years old.
During shooting, a coat rack was accidentally left out of a shot. Much later, after wrapping the scene, the crew noticed the continuity error. A coat rack was later added during post-production to correct the mistake, marking the film's only digital effect.