13. "The Only Thing More Terrifying Than The Last 12 Minutes Of This Film Are The First 92." - Suspiria
The person who came up with this tagline probably thought they were a twisted genius of sorts, but obviously failed to understand what they were implying about Dario Argento's seminal horror film: that the first 92 minutes were really scary, and the ending wasn't. Who wants to go and see a horror flick that they know isn't going to be as scary in its final moments? This is the tagline equivalent of a backhanded compliment. Except it's just a backhand, and there's no actual compliment involved at all. How this was overlooked, I don't know.