What's That Sound

What's that sound I know I've heard it before and I think I remember where. I walked down a short time ago and remember hearing it then. So I got to thinking what could it be when it hit me like a truck. It's the sound of my bed wondering where I am and if I'm going to stay up all night. I'm starting to feel like that could happen but not tonight. I'm really getting tired so I think I'll hang it up after this one. I have to get up early and I've got aLong drive before the day is over so I will get out of here and answer the bed calling.