The Doom Doc is an upcoming documentary on all things slow and heavy, and features members of Crowbar, Black Sabbath, Primitive Man, and a ton more! You can check out a piece of that interview above with ex-Black Sabbath drummer Bill Ward, who talks about doing LSD before going on stage.
Ward says he pretty much did what he had to do back in those days (like having a $75,000 cocaine budget in 1972), and says that some people have to go through that "phase," but ultimately thinks getting fucked up beforehand was a bad call.
Check out The Doom Doc on Facebook here.