To find the clips they needed, the filmmakers watched about 200 films shot in the San Francisco area, sped up by 120 percent.
A single shot from Vertigo (1958) was included, consisting of a hand about to grab the rung of a ladder.
Director Guy Maddin got the idea for the title when he saw a cashier at Whole Foods with poorly dyed green hair.
Uses clips from 98 films and three television series shot in the San Francisco area.
Originally conceived as a love letter to the city of San Francisco, the filmmakers noticed while they were collecting archive footage for it that themes from Alfred Hitchcock's film Vertigo (1958) kept popping up in the movies they were watching. Needing a structure for their film, they decided to base it around the story of Vertigo (1958).