I know exactly what you mean. Even with a full 8 hours behind you, if it feels like it's gone quick, then it's almost like there was no point to it at all. As you said, we need to savour our sleep.

That's the perfect word for it. Although it's awful when, just in case, you go to sleep way earlier than you need to and then you wake up with a massive headache.
That's not what you want when getting ready for the day. And I'm not a morning person, so I'd already be feeling bad about it anyway. Your comment about the boy hitting his face into the pole made me laugh. I did the exact same thing when I was around 10 or so. Cut my lip up and everything.
You ever seen Courage the Cowardly Dog?