My experiences with hallucinations happened when I was in a mixed state and once when I was fairly calm. Neither experience was euphoric, but I was definitely detached from reality.

The first time it happened it was incredibly scary and traumatic. I watched someone disappear and reappear. I also left my body for portions of that first episode. I watched myself from above. Very strange. I blacked out as well.

During my second experience with mental health issue related hallucinations I saw a number of strange things happening in the sky. I wasn't afraid or euphoric. It felt exactly like I was in a dream.

The common threads between both episodes were psychosis and delusion.

I saw the walls breathe and the objects out of the corner of my eye once when I was young. College. Mushrooms.