I used to have them frequently before I ever even so much as tried weed. But it wouldn't surprise me if some things are more prone to trigger it in some people. I know that specifically back sleeping is a known trigger in literature.

For me, I used to get it very frequently in grad school when I was incredibly stressed out and sleep deprived much of the time. The sleep paralysis episodes were more vivid than my usual too. I even had one point where a shadow demon slowly walked toward me as I could only lay there in wait for it to kill me.

Since grad school, they dropped off a ton and I only get episodes rarely again, even if I'm very stressed out!