No worries ;) just wanted to provide context for the answer .
Like have you seen Event Horizon? That's basically what can happen if the Psyker ****s up or gets possessed. So if you're a normal person and you're around someone whose head is a potential portal for demons to flow into your surroundings, possess, brutally murder you and feast on your soul, yeah, Psykers are terrifying lol which is why they need to be Sanctioned and most don't survive.