How to comfort your girlfriend during a scary movie ?

Me and my girlfriend are going to the movies for the first time together tomorrow were going to see Pet Semetery she loved the old one but the new one kind of scared her she's already seen it. I haven't seen it yet. I don't get why she wants to see it aga...  moreMe and my girlfriend are going to the movies for the first time together tomorrow were going to see Pet Semetery she loved the old one but the new one kind of scared her she's already seen it. I haven't seen it yet. I don't get why she wants to see it again if it scared her but I guess it's one of her favorites both of us love horror movies. If she gets upset or scared how can I comfort her ?