A real life kangaroo very aggressive towards humans if thinking they will harm them and will often kick out with its hind legs. As resulting injuries can be serious but most of the time they're only approaching to get food and only get violent if they feel they're being threatened That's when they start attacking. If they were to be punched directly in the face, they will lower their head near their back to dodge. The punch can't push them over because of their tail also use it to kick