Speaking of pachycephalosaurus, there is just no way that this is the way these things stood. I remember when I was little they gave them a more erect posture, but they’ve changed it now to where they’re standing with their bodies parallel to the ground. That just wouldn’t work; having that much weight distributed to the front and balancing it on two tiny feet, you’d fall on your face any time you walked anywhere. If these guys actually did the bighorn sheep thing with their skulls, it must not have been much of a spectacle, because you couldn’t do much more than waddle in this posture. I mean correct me if I’m wrong but that just doesn’t seem functional.