The final battle between Ahnuld and the Predator. When the alien removed its mask and roared at the camera, I remember running out of the room screaming in terror. Ironically, that movie is now one of my favorites.
I don't think people who weren't around for the 80s can really understand the impact that scene had back then. Unmasking the monster scenes were pretty old hat but I don't think any other horror movie of the time (except maybe
Friday the 13th Part 7) had a monster that was worth the buildup. The Predator was worth it. It looked completely alien and so
real! Then it beat up
Arnold Schwarzenegger!!! Back in 1987, that was roughly equivalent to someone being able to beat up God. To an eight-year-old kid, especially, the Predator was one scary mofo.