On Sunday as part of the grand experiment in entertainment excess that is the five-day long Everything Is Festival! held at Cinefamily here in Los Angeles, there will be a Firesign Theatre mini-film festival starting at 4:30p.m. (just after Neil Hamburger’s Dora Hall tribute, which starts at 2:30).

The event will feature two Firesign Theatre shorts that have not been shown theatrically in many, many years (probably not since the mid-70s, in fact) and that are not currently available on home video (yet), plus other previously unseen goodies and rarities.

First up will be the only cinematic documentation of their legendary free-form radio shows, Martian Space Party. The “Martian Space Party” show was the final program in the “Let’s Eat” radio series of 1972 and was staged for cameras and a small audience.

Everything You Know is Wrong, which is a lip-sync’d visual interpretation of their 1975 album of the same name, will be premiering in a new 5.1 surround sound presentation, prepared from a digital dupe of the film supervised by famed cinematographer Allen Daviau (E.T. Bugsy, The Color Purple).

Plus some other SUPER SECRET Firesign Theatre films and videos and a live Q&A with Peter Bergman and Phil Proctor of the Firesign Theatre, EYKIW director Allen Daviau and Firesign Theatre archivist Taylor Jessen, author of the new book and DVD-ROM Duke of Madness Motors. Yours truly will be asking the questions.

Below, the trailer, which is already in progress…