Indeed, I've been nervous going through some WILD-like experiences after hearing others' experiences, but I find that I personally don't usually have much HH, nor do I hallucinate often when I happen to wake up in SP like many do. It likely varies by person and might not something that can be easily predicted. One of the rare times I actually heard something, it was a woman's scream, but it was very faint and ended up not really being disconcerting at all when it actually happened, unlike what I might have expected. So who knows, it might not turn out so bad after all.