I've been pretty far out in paranoia when I had been smoking weed.
Imagine being totally high on strong weed and suddenly everybody's talking about you. Ain't he weird? Yeah, he's a psycho. Haha he's making weird noises! -Am I making weird noises? Oh hell yes, my mouth is making weird noises. I can't control it! Fuck! I feel like I'm 10 seconds in control, then 30 seconds out of control of anything. What if I do crazy things in that 30 seconds. Damn, it happened again! What just happened. Did I just do something crazy? Like moan or something? I have to bite my tongue so I won't make any crazy noises. Bite tongue. Damn, did I just let loose, make weird sounds and then bite it again? I have no idea.
Imagine that going on for like two hours... you know why I stopped smoking weed now, do you?
P.S. I have experienced this kind of paranoia even in small circles with close friends, to a point where I'd believe that my closest friends weren't really friends, but only pretending to be my friends because they thought I was so hilarious when I was stoned. Really fucked up. To a point where I did even consider it when I was sober again. I had to stop smoking weed. Had to. And did!