Cranium Command the walls hung propaganda posters encouraging guests to enlist in the "Cranium Command" (similar signage could be seen advertising the show around the Wonders of Life pavilion). Also there was signage including brain teasers and humorous gags and puns, setting the stage for both the concept and tone. Guests were then led into a narrow, tall room with brightly colored carpeted walls. Facing the guests was a plain movie screen, and closed automatic doors to their left. The movie screen would soon illuminate showing an animated segment featuring the boisterous and loud General Knowledge (voiced by Corey Burton) briefing his
What Is and What Should Never Be and What Should Never Be" was performed live at Led Zeppelin concerts between 1969 and 1973. A live version taken from a performance at the Royal Albert Hall in 1970 can be seen on the "Led Zeppelin DVD". Another was included on disc two of the live triple album "How The West Was Won". Two more versions were included in BBC Sessions. What Is and What Should Never Be "What Is and What Should Never Be" is a song by English rock band Led Zeppelin. It was written by Jimmy Page and Robert Plant and was included as the second