The film was shot entirely practically, meaning no soundstage, nor greenscreen, nor CGI. The actors and actresses were truly suspended over fifty feet in the air on the side of a real mountain in Utah.
To get the shots of the chairlift moving with the actors and actresses speaking on it, Writer and Director Adam Green and Director of Photography Will Barratt shot everything themselves, as the film's hired camera crew was too nervous to dangle at those heights.
Prior to the filming of this movie, Adam Green had never set foot on a ski resort in his life.
Filmed at Snowbasin Ski Resort in Ogden, Utah though the story takes place at a fictitious Vermont mountain called "Mount Holliston". Holliston is the town where Adam Green grew up. There are no ski mountains there.
Will Barratt: The Director of Photography cameos as "Sullivan", the employee who runs by pretending not to hear "Rifkin".
Adam Green: Green and fellow genre director Joe Lynch cameo as two disgruntled patrons on the chairlift the first time the chairlift stops.