Angus is under the care of gifted animal trainer Michael Hackenberger.
Elephants rear on their hind limbs occasionally in the wild.
They perform this feat regularly in captivity. By studying how an elephant rears on it's hind legs, Dr. Sereno hoped to better understand how Jobaria would stand on it's hind legs. No one had ever measured this directly. To determine the elephant's center of mass, Dr. Sereno needed to find out how much weight was on the forelimbs vs. the hind limbs of an elephant. That's when Dr. Sereno decided to weigh Angus the elephant.