i wanted to know if someone can tell me why my cat is nuts. she is like a normal cat most of the time, she sleeps alot and eats alot and is affectionate only sometimes. but sometimes out of nowhere she will make this weird noise and at the same time jump at you at scratch and bite you at the same time viciously. it comes out of nowhere and if she gets you it hurts like ****. i dont no why she does it. she can be so sweet sometimes and then she seems psychotic. i appreciate anything you could tell me.