The only drug besides weed and Ecstasy (once, the 3 day depression hangover after that put me off it) is Salvia.
The first 3 or 4 times nothing happened. Then suddenly it was like a gale force wind kicked up (east to west).
I had a square lighter (the free ones that came with Winston) and everything below the top straight edge started stretching (as if my visual field was 2 dimensional).
I had the distinct feeling that I was about to go on a bus trip around the universe.
The joint (weed and salvia mixed) was in the same hand but above the line, so I started saying "Bye-bye stompie" over and over.
This cracked my friend who smoked with me completely up. He started laughing and I became paranoid. Imagine being 4 years old about to leave on a bus and your parents start laughing at you. That's how it felt.
By this stage reality had started tearing at the line but I fought it using all my will and eventually the wind stopped.
I never got my bus trip.
I had tons of other experiences on it though. No two times were alike. I was a tree once, the bottom of someone's shoe another.
Once I was sitting (zazen style) in a courtyard in some desert environment with a wad of Salvia leaves in my mouth (I'd smoked some 30x).
Another time I was everything except Salvia. I managed to stop time the instant after being with her. I knew I loved her desperately but could also see how I couldn't go back.
I sat stuck between moments for what felt like forever trying to work what to cram into my tiny little head that I could see down there on Earth.
My last breakdown at some stage I thought my wife was Salvia and she kept killing me over and over but I kept going back.
Weird plant.