Dr. Sereno's objective with the mounts of Jobaria is to create realistic poses that capture something important about the athletic capability of Jobaria. The hind leg stand for the adult seems quite possible, based on a comparison with Angus the elephant.

What about the pose of the juvenile skeleton? Here we see an animal at a stiff walk. Notice how closely the feet are positioned under the body. Dr. Sereno was particularly impressed by the speed, agility and balance of Angus, the 12,800 pound elephant. His great sense of balance is shown by how close his feet are to a midline when he walks. Sauropod trackways, likewise, are narrow and suggest the same sense of balance for sauropods.

Dr. Sereno is convinced that Jobaria was capable of walking faster than a human being can run, rearing on its hind legs, and moving with a great sense of agility and balance.

The old view of sauropods as clumsy, water-bound behemoths is wrong, as are museum skeletons that pose sauropods as if they were wide-legged.