The gold standard against which all films were judged when I was growing up. I watched this countless Saturday afternoons on the static-y black and white TVs of my kidhood. Scared the f*uck out of me every time. Especially this scene. I have a very vivid memory of taking out the garbage one night and being scared sh*tless those skeletons were gonna come rattling around the corner and stab me with their big scary swords. Ran back inside as fast as I could.
The scariest bit is when they're all marching, slowly, step by step, then suddenly scream and begin running, swords held high, ready to chop up little kids like me.
All that gorgeous stop-motion animation is by Ray Harryhausen.