A more likely suggestion, based on the apparent anatomy allowed by the bone structure of "P. goliah", is that unlike modern kangaroos, which are plantigrade hoppers at high speeds and use their tails in pentapedal locomotion at slower speeds, "Procoptodon" was an unguligrade biped, walking in a fashion similar to hominids. Locomotion mechanics and physiology have been investigated through the examination of muscleoskeleton scaling patterns. The largest, "P. goliah", was tall and weighed up to . For "P. goliah", tendon stress was identified, which indicates limited locomotor capabilities, exposing a correlation between body mass and locomotion abilities. Ruptures in tendons demonstrate strain in elasticity of muscles in the limbs, which provides evidence that perhaps the hypothesised ability for "P. goliah" to hop may have been unlikely. Due to its locomotive performance, the species may have been vulnerable to human predation.