If something is hypnopompic, it happens when you are just beginning to wake up. Still half-conscious you imagine that the alarm clock is a fire engine, that the cockerel is your friend and that the bed is a warm womb from which you will never be induced.
It is the opposite of hypnogogic which applies to falling asleep and myoclonic jerks. Hypno is sleep and pomp is from the Greek word for send. A psychopomp is somebody who guides souls from one world to another: vide Charon, Papa Legba and Virgil.
Oh, and the immemorial reviser's belief that you'll remember a recording played to you while you're sleeping is hypnopædia.
I've got to stop doing this