Finally making his commercial breakthrough in 1972, George Carlin opens this Washington, D.C. live set musing about the uses and synonyms of a certain scatological “s” word, claiming he got fired for saying it in Vegas, where the big game is craps. Soon his attention turns to TV, including game shows and subliminal sex in commercials. The humor isn’t just in his astute observations; it’s in how he constantly devises offhand voices and even sound effects. And his timing will bowl you over.