Boomer

The biggest of the Kangaroo family these guys can stand 7 feet tall and though they look cute they can kick the snot out of a man. I know, I've been on the end of an attack, though only a mild one. They start grunting then they lean back on that massive tail and kick you with both feet at once. Given they can leap ten foot fences easily you can imagine the power those huge leg muscles can generate. Scary, but I only experienced a mildly miffed 'roo. A seriously angry one would have left me a great deal more damaged.
Of course this is not their normal way of interacting with the bald primates, generally they are calm and once used to humans will allow you to stroke their amazingly soft fur for hours.
This picture was in my car on the way to getting framed when I stopped past Steve Irwin's 'Australia Zoo'. Terri Irwin came out to have a look and fell in love with the painting which she purchased on the spot. She got it framed herself. Last I heard it was hanging in their loungeroom.