Hormones are normally unconscious releases.
I guess I'm thinking of it as biological and separate from the brain, and I'm thinking of unconscious as having to do with brain activity.
Otherwise, you could say that gastric rumbles are unconscious behaviors, that toenails growing is an unconscious behavior, or that a joint popping is an unconscious behavior.
Or, to bring this down to the LG level once more, that my ejaculation upon your mother's tits is unconscious.