Movie from the late 80's maybe early 90's. Group of space explorers crash land for some reason on a planet full of dinosaurs. Then they spend the rest of the movie surviving. 80's cheezy music and claymation dinosaurs. I only remember one scene in which they impale the claymation dinosaur on some spears while it chased them down a valley. Anybody got any idea? I don't recall it coming out it theaters, but I rented it probably 10 times as a kid.