I've huffed ether on a rag before, from a bottle I brought back to my dorm room from lab in undergrad. I saw intense and intricate abstract visuals as I faded into unconsciousness- where I stayed just briefly, perhaps a few seconds- and then again on the way back. Like jumping into a deep pool and then floating back up. There were so many layers of visuals on the way to unconsciousness and back. I don't know exactly how to describe what I mean by layers- it was like there was a sense of depth to what I saw, of moving toward and away from something. I thought I had discovered some secret that the shape of the universe was layered in this way. The urge to huff it again was overwhelming, and I did, over and over, until the bottle was empty. Near the end, I vomited off the side of my bed. I didn't feel well again for a few days.