Oh dear.
I wouldn't worry too much about that happening to you. It's a horror film, it doesn't happen every other day
My 'fears' (more like just uncomfortable-ness) are gore, puking, and for some reason my belly button. I can't stand letting anyone near my belly button, which kind of sucks because I've been working to lose a few pounds and think a piercing there would be pretty okay.. As for the puking, I had a bad incident after having oral surgery done. But these things don't keep me up at night, terrified they may suddenly happen.
Everyone (okay, maybe just me) checks the shower curtain to make sure there's no murderers and hides under the impenetrable force field that is the blanket when it's the dead of night, but in the end we know these are irrational. If you're losing sleep because you think someone's sick idea of a film will suddenly become real and you will become part of it, perhaps you should speak to someone about it..