Desc: Where In The Hell Is The Lavender House: The Longmont Potion Castle Story: Directed by David Hall, Thomas Rotenberg. With David Hall, Mike Hickey, Mike Hickey, Craig Storrod. Two filmmakers attempt to make a documentary about an anonymous phone-work artist called Longmont Potion Castle who's been releasing albums of surreal and hilarious pranks for over thirty years. In spite of a semi-successful crowdfunding campaign and the involvement of celebrity fans, the filmmakers succumb to their own infighting and bad luck leaving an unpaid camera operator to finish the film.