The Silent Film Festival hits the Castro for its 20th year with a typically excellent slew of voice-free moving images, including highlights like F.W. Murnau's kinetic 1924 The Last Laugh (starring Emil Jannings and his can't-stop-won't-stop muttonchops), Clarence Brown's 1926 Flesh and the Devil (with the luminescent Greta Garbo), and 1929's Why Be Good? (featuring the seriously adorable comedienne Colleen Moore, who deserves to be better remembered today than she is).