Inside of the While You Were Streaming video store where Van works and also lives upstairs, there's a VHS copy of The Addams Family (1991) downstairs, and DVD copies of Deep Impact (1998) and Happy Feet (2006) are visible on the shelf. In reality, Christina Ricci starred in the former while Elijah Wood starred in the latter two films.
Most wilderness scenes were filmed on a soundstage in Toronto, Canada. In the outdoor scenes, their breath was digitally imaged to appear as if they were in freezing temperatures.