However, some ambiguity surrounds the possible locomotion of "P. goliah". Some research suggests that this species was perhaps the largest hopping mammal to have ever existed. Research suggests that the most optimal weight for a large hopping marsupial is roughly 50–60 kg. Larger animals, especially the massive "P. goliah", would be substantially more at risk of tendon breakage while hopping. If "P. goliah" were to have travelled by hopping, the highest possible balance between size and speed would have been peaked, because its body would have been the largest possible to be carried by this method of locomotion.