Can you trigger a Hypnopompic State while awakening?

Well you could do it by entering sleep hallucination paralysis. When you realise that you are in sleep paralysis, then you can think of what it is you want to revisit and then the hallucination part should take over. I find it easy to enter sleep paralysis when i have had only little sleep and then i try to take a nap the next day. Always works for me.