I took 17 once, and that was "interesting".. but only in that it made me want to look into the "real deal".. this wasn't a psychedelic- it just made you.. weird. I imagine at times I was sitting there with my eyes open, but thinking I was elsewhere.. I can't remember. Legs felt heavy as lead. Occasionally felt like I was having a conversation with someone, who wasn't there- and I'd suddenly realize.. I'd talk to the TV, talk to the computer, and talk to one of those little telsa rods in glass, from my bedside.
Not much control of fine motor functions.. opening a door was very hard to get my hand to do. Peeing was really hard. Throwing up was impossible, from what I remember. Eyes bloodshot more than I've ever seen at that time, and perhaps dilated.. I can't remember.
The whole time though, you feel "ok" with it, it seems. Even though you worry about how long it will take.. you can always just play sick for a day, and lay in bed- i would think.
Next day, after finally sleeping.. horrible headache.. felt like a vise grip was on my temples, and a nail horizontally through my head. I'm not sure if I every went above 17 + a tiny bit of alcohol. Dumb idea.. age 17. Repeated the experience a couple times at lowering dosages, then decided it wasn't worth it.
I saw mostly ants/spiders/moths, streams of bugs on the carpet.. which was amusing to watch, but meh. Not worth it. Many people have claimed to see people.. I've seen it effect other's differently.. Makes you think there's a dog or something in bushes... and you focus on it... then snap out of it.