The tarantula has venomous fangs, an armored body and a secret weapon on it's big, hairy, butt. Flicking the back leg releases a cloud of hairs into the air covered with hundreds of vicious hooks. Fired into the eyes and nose - the hairs cause intense irritation. Even edema, and death. So if you ever see a tarantula with a bald butt, you know that somewhere, someone is in a world of hurt.