The first of my best trailers ever is the original Alien
The 1979 Ridley Scott classic has a trailer that just builds and builds to a real climax. We can see that the girl in this Sci Fi movie is not just going to scream when she sees the monster or twist her ankle at the worst possible moment.
It may be hard for younger audiences to appreciate but for the fist time in a Sci Fi action movie the woman is going to grab a weapon and lead the fight back.
This trailer seems a tiny bit dated but still manages to drag you into this strange far off world and its terrors, the heartbeat and screaming-like music build until we realize that
In space no one can hear you scream
Arguably one of the best movie tag lines ever