There is a thing that happens in those first few minutes after waking up where the world around you feels slightly off. Shapes at the edge of your vision that vanish the second you try to look at them directly. A flicker near the doorway. A shadow that was definitely a person two seconds ago and is now just a coat rack.
Scientists will tell you it is hypnopompic hallucinations. Your brain firing up its engines and glitching out while the system boots. Very reasonable. Very boring.
Other people will tell you it is something far more interesting. A spirit. A glitch in the matrix. A momentary tear in the fabric of reality letting something peek through before the universe patches the hole. Also reasonable. Considerably more fun at parties.