It’s something about that shriek—the way it piercingly cuts through the otherwise bird-chirping and cawing dewy morning tranquility of what’s on screen. What is on screen is D.A. Pennebaker’s footage of Country Joe & the Fish performing “Section 43” at the 1967 Monterey Pop Festival in California. Although it’s one scene in the larger sequence of a concert film that features monumentally historic performances of Otis Redding, Jimi Hendrix, The Mamas & the Papas, Janis Joplin and so many more—a document that seems to wholly embody the ’60s counter-culture—these five-and-a-half-minutes feel like something, just, a little different.