I would say Event Horizon as well. It's scary enough as it is but even worse if you went to the movies not expecting to see a horror flick. I think if you're prepared to watch a horror flick you start in a certain frame of mind so your mind it's kinda ready to take in the scares. I thought it was a sci-fi flick... Started off nice and cruisey and then...well those who have seen it know what I'm taking about.