I always wondered about that. I think seeing him there is when I realized the performance wasn't really live, except for Grace's vocal, I think. She sounds a little different than on the album version.
I never knew that was Grace on "Hey Frederick". That's pretty interesting to know.
By the way, can anybody tell me exactly what "Block Chord" means? I've played piano a lot, but I've never heard that exact term used...
"War's good business, so give your sons
But I'd rather have my country die for me" ~ Grace Slick, Rejoyce 1967