FLicKeR is a Canadian documentary film written and directed by Nik Sheehan, produced by Maureen Judge and Silva Basmajian (NFB).
The film is based on the book Chapel of Extreme Experience[1] by John G. Geiger about the work of artist Brion Gysin and his Dreamachine.
Its users would sit in front of it, close their eyes, and experience visions as a result of the flashes of light.
[1] The documentary features interviews with many prominent figures from the beat movement who had experimented with Gysin's invention and discuss his life and ideas in the film.
Notable figures include Marianne Faithfull, DJ Spooky, The Stooges, Iggy Pop, Lee Ranaldo, Genesis P-Orridge, John Giorno, Floria Sigismondi, and Kenneth Anger.