It's some sort of illusion, not optical but with touch. I've only ever noticed it when lying awake at night unable to sleep, which is rare in itself for me. It's where suddenly everything about me and my surroundings feels heavier and thicker. Your lip feels an inch thick if you bite it, and your fingers feel like the size and squishiness of sausages. But if you sit up or switch a light on, everything is normal again. Anyone else? It can't just be me.