Well that was extreme...damn,all started out with heavy motion,then the closed eyes visuals kicked in.
About 2 hours into the trip me and my dog were chilling on the grass,I lost myself in his gaze several times,each time falling deeper and deeper,until a point where it felt like we were both internally linked into some great celestial power.
After this,I was completely unable to sense emotions or read expressions,faces turned into a compilation of fractals and in my head I kept hearing electronic music,modulation,decay,evaparation,all out of usual noises (lying down on a pillow,etc. It also sounded like every noise was inverted)
Then I played piano for a little while,there were times when I felt like I knew exactly what was going on,every note's partner,every note fluctuating.
I really got focused on my visuals again,there was this book of textile designs lying around,that was pretty intense,fibrance of color,felt like it was grabbing me out of the page.
Although sound felt like it captivated me throughout the whole experience,I could imagine how,say electronic music was a smaller "fractal" of say a guitar screeching,or the movement of fabric or a person's voice,that last one was amazing as hell.
As for "spiritual and mental expansion" it felt like we are everything,and everything is us,like we are fractals that collapse in on one another to form the universe and as if...oh who knows,I'm a junkie.
By the way,the comedown was heavy as hell,I'd hit my head against a pole while hanging out clothes to dry the afternoon before the experience,got a massive headache,really wanted to sleep,shit.
Anyway,happy tripping,hope this could've helped in any possible way
Peace.