Bit By Bit

I know I've lost it as my head seems to be empty. If you look in one ear you can see clear through to the other side. There is a tiny rattle in there but I think it's just a lost rock. I've decided to put out a APB and if you find it please return it to me. It's not very useful and might only cause confusion if you try to use it. Besides, who the heck wants to see in my head!