Goodfellow's tree-kangaroos are slow and on the ground. They move at about the speed a human walks and do not hop well (hopping is something that, by contrast, terrestrial kangaroos are famed for). However, in trees, Goodfellow's tree-kangaroos are fearless and agile. They climb by wrapping their arms around the trunk of a tree and hopping with their strong back legs. This allows their arms to slide. They have very good jumping ability and can jump from trees to the ground from thirty feet up without hurting themselves.