Predator 2 - when the government guys think they have the drop on the Pred, but the Pred hears them, climbs into the rafters, and surveys the warehouse, while flipping through vision modes. And later on in the movie, the Pred throwing its disc, smashing the shotgun against the floor, and cracking its knuckles before going in for the kill of Danny Glover's character.
T2 - the T-1000 landing into the helicopter, "spilling" inside, and re-forming\
Alien 3 - the alien jumping out of the hot lead and exploding upon contact from water
The Thing (1982) - head falling off from body to form spider-head
LotR: FotR/TTT - intro'ing the Witch King (FotR), and the Minas Morgul "sky-beam" shot followed by the Witch King & his fell beast flying out and perching on the tower (TTT)
Inception - the sequential wake-ups as the van is falling, before it hits the water
The Dark Knight - Batman jumping off the skyscraper and flying into the office
Superman: The Movie - Supes walking through Luthor's trap tunnel, followed by the beatdown of the door, all the way to the line "Otis would you take the man's cape?" and Reeve's stare
Iron Man 1 - Iron Man selectively targeting the terrorists holding the victims
Iron Man 2 - RDJ putting on the suit from his briefcase, on the race track
X2 - Nightcrawler's bamf-ing in the opening attack
X:FC - the ending with Fassneto in full costume and his line "I prefer Magneto"
Spider-Man 1: the final swing onto the flag pole
TF1 - Bumblebee's first de-transformation in front of Sam (after beating up Barricade)
TF2 - Optimus' forest fight
TF3 - wing-suit sequence
JP2:TLW - raptor attack in the tall grass