I woke up and I couldn't 'fall' back 'asleep'. [=I couldn't go to sleep again]
We were still 'half asleep' when we went to school the next morning.
One moment she was 'sound asleep', the next she was wide awake!
(..) All of you. We never left. Does... Does it hurt? Dying? Quicker than falling asleep. You're nearly there, son. I'm sorry. I never wanted any of you to die for me. And, Remus, your son? (..)2011 Harry Potter and the Deathly Hallows: Part 2