A scene that still creeps me out every time I watch it. There are few films that have the ability to still phase me after years of repeated viewing. I no longer flinch at Jaws, but I had for a long time. Halloween still has a few moments of shock left in it. Trying to think of more...
Oh yes...
A film that sill makes me laugh after more then 20 viewings. And, for me it's the most clever and surprise inclusion of an alien in a film.