Well...what do they say? Ah.."there is evil there that does not sleep"
I do sleep in fact too much and it has gotten me to ask some serious questions. Sometimes i can sleep for many hours, get up and eat and then fall back into sleep for many hours again.
When i was younger i used to sleep thru the chimes of my alarm clock, my stepfather had to wake me up several times. When i started to work i went to a clock shop and asked him for the most horrible/loud sound he had, he gave me an alarm clock that sounds like a machine gun, it started of slowly but then grew louder and more evil, i bounced out of bed.
99% of the time i got up in time for work, so i wasn`t late that often, but some days i felt like i was on a unemotional robot mode, just hoping that nothing emotional would get into my way when i had days like that. Then i saw a program a few months ago about Kleine-Levin syndrome and i realized that i have a milder form of this. I recognized myself in the girl when she got up looked awake but her body/head/mind just wasn`t there, she wasn`t clear. Its like you are still asleep and all you are able to do is get something to eat and go back into bed.
Even when i am on holiday and flushed with happiness/adrenalin i still have to go back to bed for a whole day after a whole nights sleep.
You just don`t "see" clear, you are tired and "locked in". Its something neurological. Like some signals are messed up.