Heh, I'd like to do a trip like those once at least, just to see what I'd see.
Every person sees different things, as far as I know.
Yeah, it's always a bit different, depends a lot on the surroundings, your company and your current memories and thoughts. It's hard to describe, really, because mostly you aren't even yourself anymore. You kind of disassemble into a collection of senses and trains of thoughts. Sometimes you can't even tell if a thought is really only a thought, or a memory, or something someone else just said. And the hallus are great, but also terrifying. Hard edges start to wobble, boring patterns melt away and come to life, sounds flow over your mind like ocean waves, you can sense everything that touches you at the same time. Distance cues fall away, so that you can no longer tell if the church in the distance is really far away or just a miniature church three steps away, and your pal standing next to the church looks like a giant looming over the city that's actually miles behind him. The sense of time completely disappears. Sometimes it feels as if days have passed, other times you are almost disappointed that it's already over. It can also accelerate or decelerate randomly. Moments can stretch and actions can follow in quick sequence almost as if were experiencing it in fast forward.
But the coolest thing for me is that I often have a lasting feeling that everything makes sense somehow, and is good the way it is. It's almost like a cosmic understanding of everything. You can't really extrapolate anything of this feeling, though, which is a pity. You are sure that you know the solution to everything without actually knowing it. But it feels good. Many of my friends describe something similar, although some wrap it in a religious context, which it isn't like for me at all.
But it can also be fucking terrible. The situation with the toilet brush is not invented. The dude trying to get at the cookies actually broke his forearm, when we tried to calm him down. And the remaining part of his trip must have been horrible, because he was restrained and in pain. He told me the worst part was the glaring light of the hospital, he felt it searing his very soul. He doesn't do shrooms anymore.
And I also know a girl who has lasting mental problems. She blames the shrooms, but I think she already had problems when she started taking them.