[Z]

Oh definitely. It's possibly the smell of your cat on you, or perhaps it sees you as a dominant figure (seriously) and it feels threatened by you. Cats are extremely territorial. My cat despises my older brother and attacks him every time he comes round to the house. My brother has his own cat so we reckon that's the main reason; but my cat is vicious to most outsiders (and sometimes us too) - the vet told us she was a very dominant female.