I could see someone doing 50mg and i'm not kidding as i did 45mg and found it to be although very intense a good experience (not one i plan on repeating anytime soon but only because of the intensity of the visuals and body awareness) although i was a little dissociated throughout but that can be expected from a dose like this and expect psychedelic soup as its almost certain to be so.
I was used to doing doses like 10-20mg and found it stimulating, but once i took 30mg and i got a fatigued feeling and not much stimulation. It was a weird nite of camping. Sometimes 2c-i gives me weird sleepy feelings while being stimulated. Its a dreamy psychedelic.