Some of you may or may not know where your occipital is. It's the bone at the base of your skull that sits right on top of your vertebrae. The reason I chose this particular O word is because this particular bone frequently gives me grief and is frequently on my mind. You could say that my head is never quite screwed on straight . . . because of this bone. Sigh.
I did go to the chiropractor today though, so my head is screwed on straight at the moment. =)