If you wake me up, don't expect much coherence from me for the first few minutes. Here is a story to illustrate this.
My husband and a friend were having a few beers one night and then decided to go out. I went to bed but then woke to someone calling my name. It was the friend. He says, "I left my keys here have you seen them" He was yelling from the living room because I was in bed. In my sleeping stupor I said, "yes, they are on the piano!" Waking slightly I said, "wait, we don't have a piano, they are on the TV!"