Kangaroos can be VERY violent animals indeed, and the way they attack w/ forepaws and legs kind of look like what I suppose a velociraptor would do.

I like his style, but I'm not sure if human skin is the best medium for his drawings. Moreover, the fact that some of the pics seem to have been taken right after the tattoo was made is kind of off-putting because the skin looks reddened and irritated.