User blog comment:SnakeTongue237/A Recent Experience With Sleep Paralysis/@comment-26268104-20161118000126/@comment-4849011-20161118043623

I think it would depend on the person and the reason they were hallucinating. When I have my hypnopompic states, or whatever they are, there's no pattern, but they're sometimes related to comic book characters (either professionally made ones or my own). Other times they may be loosely related to something I saw or read about recently, but they're often completely out of left field. In other words, they're like dreams or nightmares.

I did read about an interesting 911 call in a book called What's the Number for 911 Again? (For those of you who don't know, 911 is the emergency services number in the USA). This guy called 911 because he was having "the hallucination with the werewolf again", which indicates that some people have reoccurring hallucinations. Apparently this guy had had problems before and was on good terms with emergency services. The dispatcher said he'd send help and asked him, "Is this frightening you, Paul?" Paul replied, "No, it's a re-run." Let's give it up for Paul, who was able to find some humor in a scary situation.