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.