Cannabis is a very strong (and often unpleasant) psychedelic for someone I know — rivaling LSD if not stronger. I’ve heard of this being true for other people too; I wonder how common it is.
This is true for me, mainly because the major effect of psychedelic drugs for me is completely 'internal' to my mind. Actually most of my trips are basically just extensions of the last one because I just revert to the same (psychotic) thought patterns. It's a pretty awful place to be which ultimately led to me getting PTSD after smoking a joint and believing some awful stuff about my existence.
This is why I can only smoke the tiniest bit. And only a couple of times a year - it’s not the same as LSD or mushrooms, but it’s just as intense what it does to my mind.
I always wanted to face my fears instead of run from them. Cannabis definitely gives me super powers, my brain races with a million thoughts and brings out a part of me which needs to escape from time to time - it brings out the best in me (strangely enough).