Massospondylus breaks the mold for sauropods. In fact, with its modest size and only partly-quadrupedal habits, it hearkens to its prosauropod forebears.
It should be able to rear on its hind legs and tail in a tripodal stance, giving it a chance to strike with its foreclaws. If you saw Diplodocus defend itself against Allosaurus in Walking With Dinosaurs that's exactly how it behaved. And anyone who's been to the American Museum of Natural History in New York (as I was ten years ago—a dream visit for me) wouldn't fail to be impresses with the adult Barosaurus skeleton mounted in a tripodal stance defending its juvenile against an Allosaurus.